APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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