APA (7th ed.) Citation

Helfet, A. J. (1982). Disorders of the knee (Second edition.). Lippincott.

Chicago Style (17th ed.) Citation

Helfet, Arthur J. Disorders of the Knee. Second edition. Philadelphia: Lippincott, 1982.

MLA (9th ed.) Citation

Helfet, Arthur J. Disorders of the Knee. Second edition. Lippincott, 1982.

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