Levine, M. (1994). Effective problem solving (2nd edition.). Prentice-Hall of India.
Chicago-stil citatLevine, Marvin. Effective Problem Solving. 2nd edition. Englewood Cliffs: Prentice-Hall of India, 1994.
MLA-referensLevine, Marvin. Effective Problem Solving. 2nd edition. Prentice-Hall of India, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.