Gaya APA

Warshawsky, D., Byrd, D, R, H. (1994). Spectrum 3, a communicative course in English (Jil.3). White Plaints, NY.: Prentice-Hall.

Gaya MLA

Warshawsky, Diane., Byrd, Donald, R., H.. "Spectrum 3, a communicative course in English". Jil.3 White Plaints, NY.: Prentice-Hall, 1994. Text.