Gibson, J. W. (1995). The Supervisory challenge: Principles and practices (2nd ed.). Prentice-Hall.
Citazione stile Chigago Style (17a edizione)Gibson, Jane Whitney. The Supervisory Challenge: Principles and Practices. 2nd ed. Englewood Cliffs, New Jersey: Prentice-Hall, 1995.
Citatione MLA (9a ed.)Gibson, Jane Whitney. The Supervisory Challenge: Principles and Practices. 2nd ed. Prentice-Hall, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.