Duncan, J., & Parker, A. (2007). Open forum 3: Academic listening and speaking. Oxford: Oxford Univ. Press.
Čikaški stil citiranjaDuncan, Janie, i Amy Parker. Open Forum 3: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.
MLA način citiranjaDuncan, Janie, i Amy Parker. Open Forum 3: Academic Listening and Speaking. Oxford: Oxford Univ. Press, 2007.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.