Penn, J. (2009). Family and friends teacher's book 1. Oxford University Press.
Čikaški stil citiranjaPenn, Julie. Family and Friends Teacher's Book 1. Oxford University Press, 2009.
MLA način citiranjaPenn, Julie. Family and Friends Teacher's Book 1. Oxford University Press, 2009.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.