Lawson, T. E. (1974). Formative instructional product evaluation: Instruments & strategies. Educational Technology Publications.
Lua i Stíl Chicago (17ú heag.)Lawson, Tom E. Formative Instructional Product Evaluation: Instruments & Strategies. Englewood Cliffs, N.J.: Educational Technology Publications, 1974.
Lua MLA (8ú heag.)Lawson, Tom E. Formative Instructional Product Evaluation: Instruments & Strategies. Educational Technology Publications, 1974.
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