APA (7th ed.) Citation

Pikas, A. (1966). Abstraction and concept formation / by A. Pikas. Harvard U.P..

Chicago Style (17th ed.) Citation

Pikas, A. Abstraction and Concept Formation / by A. Pikas. Harvard U.P., 1966.

MLA (9th ed.) Citation

Pikas, A. Abstraction and Concept Formation / by A. Pikas. Harvard U.P., 1966.

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