APA (7th ed.) Citation

Copeland, A. P., & Hammel, R. (1980). Subject Variables in Cognitive Self-Instructional Training.

Chicago Style (17th ed.) Citation

Copeland, Anne P., and Robert Hammel. Subject Variables in Cognitive Self-Instructional Training. 1980.

MLA (9th ed.) Citation

Copeland, Anne P., and Robert Hammel. Subject Variables in Cognitive Self-Instructional Training. 1980.

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