Comfort, J. (1996). Effective telephoning. Oxford: Oxford University Press.
Čikaški stil citiranjaComfort, Jeremy. Effective Telephoning. Oxford: Oxford University Press, 1996.
MLA način citiranjaComfort, Jeremy. Effective Telephoning. Oxford: Oxford University Press, 1996.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.