APA (7th ed.) Citation

Houstoun, R. A. (1929). An introduction to mathematical physics. Longmans, Green.

Chicago Style (17th ed.) Citation

Houstoun, Robert Alexander. An Introduction to Mathematical Physics. London, New York: Longmans, Green, 1929.

MLA (9th ed.) Citation

Houstoun, Robert Alexander. An Introduction to Mathematical Physics. Longmans, Green, 1929.