Cita APA (7th ed.)

Sauer, H. J., & Howell, R. H. (1983). Heat pump systems. Wiley.

Cita Chicago (17th ed.)

Sauer, Harry J., i Ronald H. Howell. Heat Pump Systems. New York: Wiley, 1983.

Cita MLA (9th ed.)

Sauer, Harry J., i Ronald H. Howell. Heat Pump Systems. Wiley, 1983.