Παραπομπή APA

Krantz, S. G. (1997). Techniques of problem solving. American Mathematical Society.

Παραπομπή Chicago Style

Krantz, Steven G. Techniques of Problem Solving. Providence, R.I.: American Mathematical Society, 1997.

Παραπομπή MLA

Krantz, Steven G. Techniques of Problem Solving. American Mathematical Society, 1997.