APA (7th ed.) Citation

Tredgold, R. F. Tredgold's mental retardation (11. ed.).

Chicago Style (17th ed.) Citation

Tredgold, R. F. Tredgold's Mental Retardation. 11. ed.

MLA (8th ed.) Citation

Tredgold, R. F. Tredgold's Mental Retardation. 11. ed.

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