APA (7e ed.) Bronvermelding

Bittel, L. R. (1976). Improving supervisory performance. McGraw-Hill Company.

Chicago (17e ed.) Bronvermelding

Bittel, Lester R. Improving Supervisory Performance. New York: McGraw-Hill Company, 1976.

MLA (9e ed.) Bronvermelding

Bittel, Lester R. Improving Supervisory Performance. McGraw-Hill Company, 1976.