Gaya APA

Rogerson, H, D., al., E. (1988). Words for students of english : A vocabulary series for esl Vol. 1 . Pittsburg: The University of Pittsburgh.

Gaya MLA

Rogerson, Holly, Deemer., al., Et. "Words for students of english : A vocabulary series for esl Vol. 1". Pittsburg: The University of Pittsburgh, 1988. Text.