APA (7th ed.) Citation

Gentry, G. (1977). Hardening and tempering: Engineers' Tools (3rd edición.). Argus Books.

Chicago Style (17th ed.) Citation

Gentry, George. Hardening and Tempering: Engineers' Tools. 3rd edición. Hertfordshire, England: Argus Books, 1977.

MLA (9th ed.) Citation

Gentry, George. Hardening and Tempering: Engineers' Tools. 3rd edición. Argus Books, 1977.

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