Saverinus, K. (2003). Developing English Grammar Mastery/ Saverinus Kaka. Yogyakarta: Yayasan Pustaka Nusatama.
Chicago Style (17th ed.) CitationSaverinus, Kaka. Developing English Grammar Mastery/ Saverinus Kaka. Yogyakarta: Yayasan Pustaka Nusatama, 2003.
Cita MLASaverinus, Kaka. Developing English Grammar Mastery/ Saverinus Kaka. Yogyakarta: Yayasan Pustaka Nusatama, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.