Citace podle APA (7th ed.)
(Aug 27, 2015). Chegg To Deliver High Quality, Low Cost Live Tutoring For Cengage Learning's Leading Calculus Materials. PR Newswire.
Citace podle Chicago (17th ed.)
"Chegg To Deliver High Quality, Low Cost Live Tutoring For Cengage Learning's Leading Calculus Materials." PR Newswire Aug 27, 2015.
Citace podle MLA (9th ed.)
"Chegg To Deliver High Quality, Low Cost Live Tutoring For Cengage Learning's Leading Calculus Materials." PR Newswire, Aug 27, 2015.
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