"Plagiarism: the act of using another person's words or ideas without giving credit to that person" -Merriam-Webster
"Cite: to mention (something) especially as an example or to support an idea or opinion" -Merriam-Webster

Tools and Resources:
Plagiarism Brainpop video
Google Image Search determine whether an image is copyright protected
Purdue Online Writing Lab resources about plagiarism, paraphrasing, fair use, and citations
SkillZone from the University of the West of England. Includes information on plagiarism and copyright
Son of Citation Machine automatically generate citations for books, articles, multimedia and social media