APA (7th ed.) Citation

Forbes, B. C. (1918). Keys to success, personal efficiency. B. C. Forbes publishing co..

Chicago Style (17th ed.) Citation

Forbes, B. C. Keys to Success, Personal Efficiency. New York: B. C. Forbes publishing co., 1918.

MLA (9th ed.) Citation

Forbes, B. C. Keys to Success, Personal Efficiency. B. C. Forbes publishing co., 1918.

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