Pigors, P. J. W., & Pigor, F. (1980). The Pigors incident process of case study. Englewood Cliffs, N.J.: Educational Technology Pub..
Citace podle Chicago (17th ed.)Pigors, Paul John William, a Faith Pigor. The Pigors Incident Process of Case Study. Englewood Cliffs, N.J.: Educational Technology Pub., 1980.
Citace podle MLA (9th ed.)Pigors, Paul John William, a Faith Pigor. The Pigors Incident Process of Case Study. Englewood Cliffs, N.J.: Educational Technology Pub., 1980.
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