Gaya APA

Valentina, D, M, C, S, A, M, A, M, C, D, D, R. (1990). Applied Systems Analysis Engineering Planningand Technology Management (1). New York: McGraw Hill Book Compay.

Gaya MLA

Valentina, Dr., Mardi, Candra,, S., Ag.,, M., Ag.,, MH.,, CM, Dan, Dr., Rotua. "Applied Systems Analysis Engineering Planningand Technology Management". 1 New York: McGraw Hill Book Compay, 1990. Text.