Citazione Stile APA (7a Edizione)

Homme, L. E. (1970). How to use contingency contracting in the classroom (Rev. ed.). Research Press.

Citazione stile Chigago Style (17a edizione)

Homme, Lloyd E. How to Use Contingency Contracting in the Classroom. Rev. ed. Champaign, Ill.: Research Press, 1970.

Citatione MLA (8a ed.)

Homme, Lloyd E. How to Use Contingency Contracting in the Classroom. Rev. ed. Research Press, 1970.