APA citiranje

Blackwell, A., & Naber, T. (2007). Open forum 2: Academic listening and speaking. Oxford: Oxford Univ. Press.

Trích dẫn kiểu Chicago

Blackwell, Angela, và Therese Naber. Open Forum 2: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.

MLA citiranje

Blackwell, Angela, và Therese Naber. Open Forum 2: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.