APA (7th ed.) Citation

Bell, E. T. (1924). The purple sapphire. A. L. Burt.

Chicago Style (17th ed.) Citation

Bell, Eric Temple. The Purple Sapphire. New York: A. L. Burt, 1924.

MLA (9th ed.) Citation

Bell, Eric Temple. The Purple Sapphire. A. L. Burt, 1924.

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