APA (7th ed.) Citation

Babson, R. W. (1940). Business barometers and investment. Harper & brothers.

Chicago Style (17th ed.) Citation

Babson, Roger Ward. Business Barometers and Investment. New York, London: Harper & brothers, 1940.

MLA (9th ed.) Citation

Babson, Roger Ward. Business Barometers and Investment. Harper & brothers, 1940.