APA (7th ed.) Citation

Zappe, R. W. (1981). Valve selection handbook. Gulf.

Chicago Style (17th ed.) Citation

Zappe, R. W. Valve Selection Handbook. Houston: Gulf, 1981.

MLA (9th ed.) Citation

Zappe, R. W. Valve Selection Handbook. Gulf, 1981.

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