Citazione Stile APA (7a Edizione)
Porter, P. A., & Grant, M. (1992). Communicating Effectively In English: Oral Communication for Non-Native Speakers. Heinle & Heinle Publishers.
Citazione stile Chigago Style (17a edizione)
Porter, Patricia A., e Margaret Grant. Communicating Effectively In English: Oral Communication for Non-Native Speakers. New Jersey: Heinle & Heinle Publishers, 1992.
Citatione MLA (9a ed.)
Porter, Patricia A., e Margaret Grant. Communicating Effectively In English: Oral Communication for Non-Native Speakers. Heinle & Heinle Publishers, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.