Gaya APA

Octaberlina, L, R. (2011). Progressive english:general english for tertiary students / Like Raskova Octaberlina . Malang: Uin Malang Press.

Gaya MLA

Octaberlina, Like, Raskova. "Progressive english:general english for tertiary students / Like Raskova Octaberlina". Malang: Uin Malang Press, 2011. Text.