APA

Porter P. A., Grant M. & Draper M. (1985). Communicating effectively in English: oral communication for non-native speakers. Belmont, Calif: Wadsworth Pub. Co.

Chicago

Porter Patricia A, Grant Margaret and Draper Mary. 1985. Communicating effectively in English: oral communication for non-native speakers. Belmont, Calif: Wadsworth Pub. Co.

Harvard

Porter P. A., Grant M. and Draper M. (1985). Communicating effectively in English: oral communication for non-native speakers. Belmont, Calif: Wadsworth Pub. Co.

MLA

Porter Patricia A, Grant Margaret and Draper Mary. Communicating effectively in English: oral communication for non-native speakers. Belmont, Calif: Wadsworth Pub. Co. 1985.