APA aipamena

Pikas, A. (1966). Abstraction and concept formation: An interpretative investigation into a group of psychological frames of reference. Harvard University Press.

Chicago Style aipamena

Pikas, Anatol. Abstraction and Concept Formation: An Interpretative Investigation into a Group of Psychological Frames of Reference. Cambridge: Harvard University Press, 1966.

MLA aipamena

Pikas, Anatol. Abstraction and Concept Formation: An Interpretative Investigation into a Group of Psychological Frames of Reference. Harvard University Press, 1966.