APA Edition Citation

Tharp, R. G. A., & Wetzel, R. J. (1969). Behaviour modification in the natural environment.

Chicago Edition Citation

Tharp, Roland G. And, and Ralph J. Wetzel. Behaviour Modification in the Natural Environment. 1969.

MLA Edition Citation

Tharp, Roland G. And, and Ralph J. Wetzel. Behaviour Modification in the Natural Environment. 1969.

Warning: These citations may not always be 100% accurate.