APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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