APA (7th ed.) Citation

Down, P. G. (1969). Heating and cooling load calculations. Pergamon Press.

Chicago Style (17th ed.) Citation

Down, P. G. Heating and Cooling Load Calculations. Oxford: Pergamon Press, 1969.

MLA (9th ed.) Citation

Down, P. G. Heating and Cooling Load Calculations. Pergamon Press, 1969.