Gaya APA

Lyn, N, O, S, [. (2006). Traces alpha 1 : english for university students (Ed. 2). Boston: McGraw Hill.

Gaya MLA

Lyn, Nina, Ong, Sue, [et.al]. "Traces alpha 1 : english for university students". Ed. 2 Boston: McGraw Hill, 2006. Text.