Gaya APA
Octaberlina, L, R. (2011).
Progressive English: general English for tertiary students .
Malang :
UIN-Maliki Press.
Gaya MLA
Octaberlina, Like, Raskova.
"Progressive English: general English for tertiary students".
Malang :
UIN-Maliki Press,
2011.
Buku.