APA način citiranja

Gude, K., & Duckworth, M. (1998). Proficiency masterclass: Workbook with answers. Oxford: Oxford University Press.

Čikaški stil citiranja

Gude, Kathy., i Michael Duckworth. Proficiency Masterclass: Workbook With Answers. Oxford: Oxford University Press, 1998.

MLA način citiranja

Gude, Kathy., i Michael Duckworth. Proficiency Masterclass: Workbook With Answers. Oxford: Oxford University Press, 1998.