A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Breaks over spaces and punctuation
Spelling
Part III. Style 20 spelling

Your word processor may also allow certain types of unacceptable line breaks to occur over spaces or punctuation. Always review your paper for such breaks.

Initials. If initials are used in place of both a person's first and middle names, include a space between them but do not divide them over a line. If necessary, you can break the name before the last name. See also 24.2.1.

M. F. K. Fisher

M. F. K. / Fisher

but not

M. / F. K. Fisher

Numbers and dates. Never put a line break within numbers expressed as numerals (25,000) or any terms consisting of numerals plus symbols, abbreviations, or units of measure (10%; £6 4s. 6d.; 6:40 p.m.; AD 1895; 245 ml). In dates, do not divide a day of the month from the name of the month (February 15). See chapter 23 for more on numbers and date systems.

Abbreviations. Do not break abbreviations over lines, regardless of their internal capitalization, punctuation, and spacing (BA, U.S., NATO, p.m., kg, PhD, Gov. Gen.). The only exception is that an abbreviation that already includes a hyphen, such as AFL-CIO, may be divided on the hyphen. See chapter 24 for more on abbreviations.

Punctuation. Never begin a line with a closing quotation mark, parenthesis, or bracket. Never end a line with an opening quotation mark, parenthesis, or bracket or with (a) or (1), as at the beginning of a list. See chapter 21 for more on punctuation and 23.4.2 for lists. Avoid breaking an ellipsis (see 25.3.2) over a line; use your word processor's ellipsis character to prevent this problem.

URLs and e-mail addresses. Avoid breaking URLs and e-mail addresses over lines. If you have to break one, insert the break after a colon, a slash (or double slash), or the symbol @ but before a period or any other punctuation or symbols. Hyphens are frequently included as part of a URL or e-mail address, so to avoid confusion, never add a hyphen to indicate the break, or break a URL or address at an existing hyphen.

http://

www.press.uchicago.edu

http://www

.press.uchicago.edu

http://www.press.uchicago.edu/

cgi-bin/hfs.cgi/00/12917.ctl

If your word processor automatically formats URLs and e-mail addresses as hyperlinks, it may break these items contrary to the guidelines above. In many settings, such breaks are acceptable as long as the full URL or address is clearly identified as a hyperlink (through underlining or a second color) and no extra hyphens are added to indicate the line breaks.