Cita APA (7a ed.)

Freeman, D., & Graves, K. L. (2005). Icon intro: International communication through english : [student book].

Cita Chicago Style (17a ed.)

Freeman, Donald, y Kathleen Lee Graves. Icon Intro: International Communication Through English : [student Book]. New York, 2005.

Cita MLA (9a ed.)

Freeman, Donald, y Kathleen Lee Graves. Icon Intro: International Communication Through English : [student Book]. 2005.