Gaya APA

Hartono, . et al (2018). Englis for govermental science : english for spesific purposes (Cet. 1.). Malang: Universitas Muhammadiyah Malang.

Gaya MLA

Hartono, . et al. "Englis for govermental science : english for spesific purposes". Cet. 1. Malang: Universitas Muhammadiyah Malang, 2018. Text.