Gaya APA

VERDERBER, R, F., VERDERBER, K, S. (1998). Inter-act (Ed. 8, Cet. 1). Belmont: Wadsworth Publishing.

Gaya MLA

VERDERBER, Rudolph, F.., VERDERBER, Kathleen, S.. "Inter-act". Ed. 8, Cet. 1 Belmont: Wadsworth Publishing, 1998. Buku.