Lua APA (7ú heag.)

Bartel, C. R. (1976). Instructional analysis and materials development. ATS.

Lua i Stíl Chicago (17ú heag.)

Bartel, Carl R. Instructional Analysis and Materials Development. Illinois: ATS, 1976.

Lua MLA (9ú heag.)

Bartel, Carl R. Instructional Analysis and Materials Development. ATS, 1976.

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