APA (7th ed.) Citation

Heasley, B., Maskur, & Aji, P. (1998). English in use SMU. Erlangga.

Chicago Style (17th ed.) Citation

Heasley, Brendan, Maskur, and Paulan Aji. English in Use SMU. Erlangga, 1998.

MLA (8th ed.) Citation

Heasley, Brendan, et al. English in Use SMU. Erlangga, 1998.