APA (7th ed.) Citation

Gekoski, N. (1962). Aptitude testing: Theory, interpretation and practices.

Chicago Style (17th ed.) Citation

Gekoski, Norman. Aptitude Testing: Theory, Interpretation and Practices. [Philadelphia?], 1962.

MLA (8th ed.) Citation

Gekoski, Norman. Aptitude Testing: Theory, Interpretation and Practices. 1962.

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