Levine, M. (1994). Effective problem solving (2nd edition.). Prentice-Hall of India.
استشهاد بنمط شيكاغوLevine, Marvin. Effective Problem Solving. 2nd edition. Englewood Cliffs: Prentice-Hall of India, 1994.
MLA استشهادLevine, Marvin. Effective Problem Solving. 2nd edition. Prentice-Hall of India, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.