Gaya APA

Gordon, G. (1990). Quantitative decision making for business 3rd (3rd ed.). Englewood Cliffs, NJ: Prentice-Hall, c.

Gaya MLA

Gordon, Gilbert. "Quantitative decision making for business 3rd". 3rd ed. Englewood Cliffs, NJ: Prentice-Hall, c, 1990. Buku Wajib.