Muchlis, A. (2011). Key to Speaking. Jaring Pena.
Cita Chicago (17th ed.)Muchlis, Ach. Key to Speaking. Jaring Pena, 2011.
Cita MLA (9th ed.)Muchlis, Ach. Key to Speaking. Jaring Pena, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)