Gaya APA

Pora, Y. (2003). Develop your english vocabulary, grammar and idiom / Yusron Pora . : Pustaka Pelajar.

Gaya MLA

Pora, Yusron. "Develop your english vocabulary, grammar and idiom / Yusron Pora". : Pustaka Pelajar, 2003. Hukum Ekonomi Syariah (Mua'malah).