APA Style

Utama, P, R. (2002). Executive's complete portfolio of business letters (Cet.3). {S.l]: Pustaka Referensia Utama.

MLA Style

Utama, Pustaka, Referensia. "Executive's complete portfolio of business letters". Cet.3 {S.l]: Pustaka Referensia Utama, 2002. Text.