Cita APA

Byrd, P., & Benson, B. (1994). Problem/solution: A reference for ESL writters. Boston, MA: Heinle & Heinle Publishers.

Citación estilo Chicago

Byrd, Patricia, y Beverly Benson. Problem/solution: A Reference for ESL Writters. Boston, MA: Heinle & Heinle Publishers, 1994.

Cita MLA

Byrd, Patricia, y Beverly Benson. Problem/solution: A Reference for ESL Writters. Boston, MA: Heinle & Heinle Publishers, 1994.