Gaya APA

Alexander, L, G. (2006). First Things First Students' Book: An Integrated Course for Beginners (Cet. 28). Yogyakarta: kanisius.

Gaya MLA

Alexander, L., G.. "First Things First Students' Book: An Integrated Course for Beginners". Cet. 28 Yogyakarta: kanisius, 2006. Text.