Cita APA (7th ed.)
Porter, P. A., & Grant, M. (1992). Communicating Effectively In English: Oral Communication for Non-Native Speakers. Heinle & Heinle Publishers.
Cita Chicago (17th ed.)
Porter, Patricia A., i Margaret Grant. Communicating Effectively In English: Oral Communication for Non-Native Speakers. New Jersey: Heinle & Heinle Publishers, 1992.
Cita MLA (9th ed.)
Porter, Patricia A., i Margaret Grant. Communicating Effectively In English: Oral Communication for Non-Native Speakers. Heinle & Heinle Publishers, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.