Gaya APA

Putra, E, J., Trim, B. (2008). Becoming an Entrepreneur is Easy . Surabaya: MIC-PT Menuju Insan Cemerlang.

Gaya MLA

Putra, Eka, Julianto., Trim, Bambang. "Becoming an Entrepreneur is Easy". Surabaya: MIC-PT Menuju Insan Cemerlang, 2008. Textbook.