Gaya APA

Doff, A. et al (1993). Meaning into words upper-intermediate : an integrated course for students of English . Australia: Effendiharahap Publishing Coy.

Gaya MLA

Doff, Adrian. et al. "Meaning into words upper-intermediate : an integrated course for students of English". Australia: Effendiharahap Publishing Coy, 1993. Text.