Gaya APA

Kast, F, E., Johnson, R, A. (1973). Ther theory and management of systems. (1973). : New York : McGraw-Hill,.

Gaya MLA

Kast, Fremont, E.., Johnson, Richard, A.. "Ther theory and management of systems.". 1973 : New York : McGraw-Hill,, 1973. Text.