Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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