Gaya APA

Widjaya, I, K. (2012). Enterprise resource planning (Ed.1, Cet.1). Yogyakarta: Graha Ilmu.

Gaya MLA

Widjaya, Iwan, Kurniawan. "Enterprise resource planning". Ed.1, Cet.1 Yogyakarta: Graha Ilmu, 2012. Textbook.