Popham, W. J. (1972). An evaluation guidebook: A set of practical guidelines for the educational evaluator. Instructional Objectives Exchange.
Lua i Stíl Chicago (17ú heag.)Popham, W. James. An Evaluation Guidebook: A Set of Practical Guidelines for the Educational Evaluator. Los Angeles, Calif: Instructional Objectives Exchange, 1972.
Lua MLA (8ú heag.)Popham, W. James. An Evaluation Guidebook: A Set of Practical Guidelines for the Educational Evaluator. Instructional Objectives Exchange, 1972.
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