Sudarna Hs, V. (2003). Petunjuk Praktis Menghadapi TOEFL/ V. Sudarna Hs. Yogyakarta: Kanisius.
Dyfyniad Arddull ChicagoSudarna Hs, V. Petunjuk Praktis Menghadapi TOEFL/ V. Sudarna Hs. Yogyakarta: Kanisius, 2003.
Dyfyniad MLASudarna Hs, V. Petunjuk Praktis Menghadapi TOEFL/ V. Sudarna Hs. Yogyakarta: Kanisius, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.