APA aipamena

Levine, M. (1994). Effective problem solving (2nd edition.). Prentice-Hall of India.

Chicago Style aipamena

Levine, Marvin. Effective Problem Solving. 2nd edition. Englewood Cliffs: Prentice-Hall of India, 1994.

MLA aipamena

Levine, Marvin. Effective Problem Solving. 2nd edition. Prentice-Hall of India, 1994.