APA (7th ed.) Citation

Nicholson, J. S. (1902). Principles of political economy. A. and C. Black.

Chicago Style (17th ed.) Citation

Nicholson, J. Shield. Principles of Political Economy. London: A. and C. Black, 1902.

MLA (9th ed.) Citation

Nicholson, J. Shield. Principles of Political Economy. A. and C. Black, 1902.

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