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

Treaties
Parenthetical citations–reference list style: citing specific types of sources
Part II. Source Citation

The texts of treaties signed before 1949 are published in United States Statutes at Large; the unofficial citation is to the Treaty Series or the Executive Agreement Series. Those signed in 1949 or later appear in United States Treaties and Other International Agreements (UST, 1950—), or Treaties and Other International Acts Series (TIAS, 1946—). Treaties involving more than two nations may be found in the United Nations Treaty Series: Treaties and International Agreements Registered or Filed or Recorded with the Secretariat of the United Nations or, from 1920 to 1946, in the League of Nations Treaty Series.

Put titles of treaties in roman type, not enclosed in quotation marks. Italicize the names of the publications, even if they are multivolume works or series. An exact date indicates the date of signing and may be included in addition to the year the treaty was published.

R: U.S. Department of State. 1963. Nuclear Weapons Test Ban, August 5, 1963. United States Treaties and Other International Agreements 14, pt. 2.

United States. 1922. Naval Armament Limitation Treaty. February 26, 1922. United States Statutes at Large 43, pt. 2.

P: (U.S. Department of State 1963)

(United States 1922)