APA (7th ed.) Citation

O'Donnell, M., Hoopes, F., & Hoopes, M. C. (1950). Engine whistles (1950 edition.). Row, Peterson and Company.

Chicago Style (17th ed.) Citation

O'Donnell, Mabel, Florence Hoopes, and Margaret Campbell Hoopes. Engine Whistles. 1950 edition. Evanston, Illinois ; New York City ; San Francisco: Row, Peterson and Company, 1950.

MLA (8th ed.) Citation

O'Donnell, Mabel, et al. Engine Whistles. 1950 edition. Row, Peterson and Company, 1950.