APA (7th ed.) Citation

(1982). Valve world. Netherlands : Willy van der Hoeven.

Chicago Style (17th ed.) Citation

Valve World. Netherlands : Willy van der Hoeven, 1982.

MLA (9th ed.) Citation

Valve World. Netherlands : Willy van der Hoeven, 1982.

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