APA (7e ed.) Bronvermelding

Krulik, S., & Rudnick, J. A. (1989). Problem solving: Handbook for senior high school teachers. Allyn and Bacon.

Chicago (17e ed.) Bronvermelding

Krulik, Stephen, en Jesse A. Rudnick. Problem Solving: Handbook for Senior High School Teachers. Boston: Allyn and Bacon, 1989.

MLA (9e ed.) Bronvermelding

Krulik, Stephen, en Jesse A. Rudnick. Problem Solving: Handbook for Senior High School Teachers. Allyn and Bacon, 1989.