APA (7th ed.) Citation

Gropper, G. L. (1974). Instructional strategies. Educational Technology Publications.

Chicago Style (17th ed.) Citation

Gropper, George Leonard. Instructional Strategies. Englewood Cliffs, N.J.: Educational Technology Publications, 1974.

MLA (9th ed.) Citation

Gropper, George Leonard. Instructional Strategies. Educational Technology Publications, 1974.