Gaya APA

, F., D., F., M., N. (2007). SUCCESS IN ACADEMIC ENGLISH (1). Yogyakarta: Graha Ilmu.

Gaya MLA

, Flora, Debora, Floris,, Maria, Natalia. "SUCCESS IN ACADEMIC ENGLISH". 1 Yogyakarta: Graha Ilmu, 2007. Buku Inti.