Pigors, P. J. W., & Pigors, F. (1961). Case method in human relations: The incident process. McGraw-Hill.
Цитирование в стиле Чикаго (17-е изд.)Pigors, Paul John William, и Faith Pigors. Case Method in Human Relations: The Incident Process. New York: McGraw-Hill, 1961.
Цитирование MLA (9-е изд.)Pigors, Paul John William, и Faith Pigors. Case Method in Human Relations: The Incident Process. McGraw-Hill, 1961.