APA引文

WALIDI. (2006). Step by Step To Speak English. Klaten: Citra Aji Parama.

Chicago Style Citation

WALIDI. Step By Step To Speak English. Klaten: Citra Aji Parama, 2006.

MLA引文

WALIDI. Step By Step To Speak English. Klaten: Citra Aji Parama, 2006.

警告：這些引文格式不一定是100％准確.