Citazione Stile APA (7a Edizione)

Enrick, N. L. (1967). Management planning ; a systems approach. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Enrick, Norbert Lloyd. Management Planning ; a Systems Approach. New York: McGraw-Hill, 1967.

Citatione MLA (9a ed.)

Enrick, Norbert Lloyd. Management Planning ; a Systems Approach. McGraw-Hill, 1967.