APA (7th ed.) Citation

Denner, S., & Haskell, T. (1981). Heat pumps. Cooperative Extension, College of Agriculture, Washington State University.

Chicago Style (17th ed.) Citation

Denner, Steve, and Ted Haskell. Heat Pumps. Pullman: Cooperative Extension, College of Agriculture, Washington State University, 1981.

MLA (9th ed.) Citation

Denner, Steve, and Ted Haskell. Heat Pumps. Cooperative Extension, College of Agriculture, Washington State University, 1981.