Gaya APA

Filtzgerald, J., Filtzerald, A, F. (1987). Fundamentals of systems anlysis : using structured analysis and design techniques (3rd.ed.). New York: John Wiley & Sons.

Gaya MLA

Filtzgerald, Jerry., Filtzerald, Andra, F.. "Fundamentals of systems anlysis : using structured analysis and design techniques". 3rd.ed. New York: John Wiley & Sons, 1987. Text.