Cita APA (7th ed.)
Roffe, I. (2004). E-Learning. Emerald Group Publishing Limited.
Cita Chicago (17th ed.)
Roffe, Ian. E-Learning. Bradford, England: Emerald Group Publishing Limited, 2004.
Cita MLA (9th ed.)
Roffe, Ian. E-Learning. Emerald Group Publishing Limited, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.