Santos, E. K. e. a., Cardenas, V. B., Malaya, P. N., Maranan, M. A., & Rada, B. R. (1999). Pinoy entreprenor: A series on Filipino money-making ventures, First Year (Textbook). Diwa Learning Systems, Inc.

Santos, Elsie K. et al, Violeta B. Cardenas, Perlito N. Malaya, Mercy A. Maranan, and Berly R. Rada. Pinoy Entreprenor: A Series on Filipino Money-making Ventures, First Year (Textbook). Makati City: Diwa Learning Systems, Inc, 1999.

Santos, Elsie K. et al, et al. Pinoy Entreprenor: A Series on Filipino Money-making Ventures, First Year (Textbook). Diwa Learning Systems, Inc, 1999.