Gaya APA

G, S. et al (2005). Being competent in english for senior high school students language programme year XII . Surakarta: Gramedia widia sarana indonesia.

Gaya MLA

G, Suharto. et al. "Being competent in english for senior high school students language programme year XII". Surakarta: Gramedia widia sarana indonesia, 2005. Buku Penunjang.