Castro, P. P. M. (1990). Calibration of the sysops computer model. Philippine Engineering Journal.
Chicago Style (17. basım) AtıfCastro, Peter Paul M. "Calibration of the Sysops Computer Model." Philippine Engineering Journal 1990.
MLA (9th ed.) AtıfCastro, Peter Paul M. "Calibration of the Sysops Computer Model." Philippine Engineering Journal, 1990.
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