APA (7th ed.) Citation

Knirk, F. G. (1979). Designing productive learning environments. Educational Technology Publications.

Chicago Style (17th ed.) Citation

Knirk, Frederick G. Designing Productive Learning Environments. Englewood Cliffs, N.J.: Educational Technology Publications, 1979.

MLA (8th ed.) Citation

Knirk, Frederick G. Designing Productive Learning Environments. Educational Technology Publications, 1979.