APA (7th ed.) Citation

Castro, P. P. M. (1990). Calibration of the sysops computer model. Philippine Engineering Journal.

Chicago Style (17th ed.) Citation

Castro, Peter Paul M. "Calibration of the Sysops Computer Model." Philippine Engineering Journal 1990.

MLA (9th ed.) Citation

Castro, Peter Paul M. "Calibration of the Sysops Computer Model." Philippine Engineering Journal, 1990.

Warning: These citations may not always be 100% accurate.