Gaya APA

Alexander, L. (2008). Practice and Progress : An Integrated Course for Pre-Intermediate Students (Cet. 31). Yogyakarta: Kanisius.

Gaya MLA

Alexander, L.G.. "Practice and Progress : An Integrated Course for Pre-Intermediate Students". Cet. 31 Yogyakarta: Kanisius, 2008. Monograf.