201784 Krulik, S., & Rudnick, J. A. (1980). Problem solving: A handbook for teachers. Boston : Allyn and Bacon.
Citazione stile Chigago Style (17a edizione)201784 Krulik, Stephen, e Jesse A. Rudnick. Problem Solving: A Handbook for Teachers. Boston : Allyn and Bacon, 1980.
Citatione MLA (9a ed.)201784 Krulik, Stephen, e Jesse A. Rudnick. Problem Solving: A Handbook for Teachers. Boston : Allyn and Bacon, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.