Citazione APA

Porter, P. A. (1992). Communicating effectively in English: Oral communication for non-native speakers. Boston, MA: Heinle & Heinle.

Stile di citazione Chicago

Porter, Patricia A. Communicating Effectively in English: Oral Communication for Non-native Speakers. Boston, MA: Heinle & Heinle, 1992.

Citazione MLA

Porter, Patricia A. Communicating Effectively in English: Oral Communication for Non-native Speakers. Boston, MA: Heinle & Heinle, 1992.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.