Snelbecker, G. E. (1974). Learning theory, instructional theory, and psychoeducational design. McGraw-Hill.

Snelbecker, Glenn E. Learning Theory, Instructional Theory, and Psychoeducational Design. New York: McGraw-Hill, 1974.

Snelbecker, Glenn E. Learning Theory, Instructional Theory, and Psychoeducational Design. McGraw-Hill, 1974.