Gaya APA

YUSUF, M., SULAIMAN, J. (2012). Productivity and social economic conditions of rubber small holder's in Kabupaten Banyuasin, South . Surabaya: PPPM STIE Perbanas.

Gaya MLA

YUSUF, Muhammad., SULAIMAN, Jamalludin. "Productivity and social economic conditions of rubber small holder's in Kabupaten Banyuasin, South ". Surabaya: PPPM STIE Perbanas, 2012. Artikel.