APA (7th ed.) Citation

Orrey, L. (1948). The foundations of harmony & composition. I. Pitman.

Chicago Style (17th ed.) Citation

Orrey, Leslie. The Foundations of Harmony & Composition. London: I. Pitman, 1948.

MLA (9th ed.) Citation

Orrey, Leslie. The Foundations of Harmony & Composition. I. Pitman, 1948.

Warning: These citations may not always be 100% accurate.