Bittel, L. R. (1968). What every supervisor should know (2nd ed.). McGraw-Hill.
Citazione stile Chigago Style (17a edizione)Bittel, Lester R. What Every Supervisor Should Know. 2nd ed. New York: McGraw-Hill, 1968.
Citatione MLA (9a ed.)Bittel, Lester R. What Every Supervisor Should Know. 2nd ed. McGraw-Hill, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.