APA (7th ed.) Citation

Holland, M., Pringle, H. F., & Wright, O. (1928). Industrial explorers. Harper & Brothers.

Chicago Style (17th ed.) Citation

Holland, Maurice, Henry F. Pringle, and Orville Wright. Industrial Explorers. New York ; London: Harper & Brothers, 1928.

MLA (9th ed.) Citation

Holland, Maurice, et al. Industrial Explorers. Harper & Brothers, 1928.