Gaya APA

Rahardi, K., Suwandari, A, R. (2007). Business & Secretarial English Gambit's (Cet. 1). Yogyakarta: Pinus Book Publisher.

Gaya MLA

Rahardi, Kunjana., Suwandari, Agustina, Reni. "Business & Secretarial English Gambit's". Cet. 1 Yogyakarta: Pinus Book Publisher, 2007. Text.