Gaya APA

Pegels, C, C., Lotfi, V. (1989). Decision support systems for management science/operations research . Homewood, Illinois: Richard D. Irwin.

Gaya MLA

Pegels, C., Carl., Lotfi, Vahid. "Decision support systems for management science/operations research". Homewood, Illinois: Richard D. Irwin, 1989. Text.