Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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