Gaya APA

HARRISON, M. et al (2012). PALGRAVE STUDY SKILL IMPROVE YOUR GRAMMAR (ED.1). : PALGRAVE MACMILLAN.

Gaya MLA

HARRISON, MARK. et al. "PALGRAVE STUDY SKILL IMPROVE YOUR GRAMMAR". ED.1 : PALGRAVE MACMILLAN, 2012. Prodi S1 Sastra Inggris.