Gaya APA

Gullett, H, G, H, ;, C, R. (1988). Modern business management: a systems and environmental approach (cet. 7). America: McGraw hill.

Gaya MLA

Gullett, Herbert, G., Hicks, ;, C., Ray. "Modern business management: a systems and environmental approach". cet. 7 America: McGraw hill, 1988. Text.