APA (7th ed.) Citation

Harrison, R., Mortimer, N. D., & Smarason, O. B. (1990). Geothermal heating: A handbook of engineering economics. Pergamon Press.

Chicago Style (17th ed.) Citation

Harrison, R., N. D. Mortimer, and O. B. Smarason. Geothermal Heating: A Handbook of Engineering Economics. Oxford ; New York: Pergamon Press, 1990.

MLA (9th ed.) Citation

Harrison, R., et al. Geothermal Heating: A Handbook of Engineering Economics. Pergamon Press, 1990.