Cita APA (7th ed.)
(May 9, 2012). Cengage Learning and Blackboard Launch Digital Content Integration. PR Newswire.
Cita Chicago (17th ed.)
"Cengage Learning and Blackboard Launch Digital Content Integration." PR Newswire May 9, 2012.
Cita MLA (9th ed.)
"Cengage Learning and Blackboard Launch Digital Content Integration." PR Newswire, May 9, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.