APA (7th ed.) Citation

Piaget, J. (1973). Main trends in psychology. George Allen and Unwin Ltd.

Chicago Style (17th ed.) Citation

Piaget, Jean. Main Trends in Psychology. George Allen and Unwin Ltd, 1973.

MLA (9th ed.) Citation

Piaget, Jean. Main Trends in Psychology. George Allen and Unwin Ltd, 1973.

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