APA Цитирование

Duckworth, M., & Michael Duckworth; Kathy Gude. (1999). Countdown to First Certificate: Workbook with key and tapescripts. Oxford: Oxford University Press.

Chicago-стиль цитирования

Duckworth, Michael, và Michael Duckworth; Kathy Gude. Countdown to First Certificate: Workbook With Key and Tapescripts. Oxford: Oxford University Press, 1999.

MLA-цитирование

Duckworth, Michael, và Michael Duckworth; Kathy Gude. Countdown to First Certificate: Workbook With Key and Tapescripts. Oxford: Oxford University Press, 1999.

Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.