APA aipamena

Crisostomo, C. Q., Leung, V. C. P., Reidenbach, K. R. D., Villar, M. Z. P., & Virola, H. R. B. J. (1991). Focus, Inc. a systems and procedures study. College of Engineering.

Chicago Style aipamena

Crisostomo, Catherine Q., Vincent Charles P. Leung, Kathryn Rose D. Reidenbach, Maria Zenaida P. Villar, and Henry Rophen B. Jr Virola. Focus, Inc. a Systems and Procedures Study. Diliman, Quezon City: College of Engineering, 1991.

MLA aipamena

Crisostomo, Catherine Q., et al. Focus, Inc. a Systems and Procedures Study. College of Engineering, 1991.