Baker, R. L., & Schutz, R. E. (1971). Instructional product development. Van Nostrand.
Lua i Stíl Chicago (17ú heag.)Baker, Robert L., agus Richard E. Schutz. Instructional Product Development. New York: Van Nostrand, 1971.
Lua MLA (9ú heag.)Baker, Robert L., agus Richard E. Schutz. Instructional Product Development. Van Nostrand, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.