Cita APA (7th ed.)

SWAN, M., & WALTER, C. (1986). The cambridge english course 1: Practice book. Cambridge Uni. Press;LP3B.

Cita Chicago (17th ed.)

SWAN, Michael, i Catherine WALTER. The Cambridge English Course 1: Practice Book. Cambridge;Jakarta: Cambridge Uni. Press;LP3B, 1986.

Cita MLA (9th ed.)

SWAN, Michael, i Catherine WALTER. The Cambridge English Course 1: Practice Book. Cambridge Uni. Press;LP3B, 1986.