Better English Writing - Geddes Grosset Webster’s Word Power 2014

Acknowledging sources/copyright
Writing for the media

We’ve mentioned copyright before, but we’re going to mention it again, because so many people think that if they use material from the internet that isn’t actually on a printed page, they don’t have to acknowledge it. This is just not true. You must identify all the material that is not your own - no matter what you are writing, where it comes from or what it is. If you copy any text, diagrams, photographs, art, music or web pages without acknowledging their source, then you are infringing copyright law, and could be prosecuted.

Copyright stays with the originator during his or her lifetime, and with the heirs to their estate for 70 years after their death.