Gaya APA

Keller, E, -, A., Warner, S, -, A. (2002). Conversation Gambits: Real English Conversation Practices (ed 1). United States of America: Heinle.

Gaya MLA

Keller, Eric, -, A., Warner, Sylvia, -, A. "Conversation Gambits: Real English Conversation Practices". ed 1 United States of America: Heinle, 2002. Text.