Cita APA (7a ed.)

Keller, E., & Warner, S. T. (1988). Conversation gambits: Real english conversation practices. LTP.

Cita Chicago Style (17a ed.)

Keller, Eric, y Sylvia T. Warner. Conversation Gambits: Real English Conversation Practices. England: LTP, 1988.

Cita MLA (9a ed.)

Keller, Eric, y Sylvia T. Warner. Conversation Gambits: Real English Conversation Practices. LTP, 1988.