APA (7th ed.) Citation

So Relle, R. P., Smith, H. H., Foster, W. R., & Blanchard, C. I. (1937). Gregg typing: Complete course (2d ed.). The Gregg Pub. Co..

Chicago Style (17th ed.) Citation

So Relle, Rupert Pitt, Harold Harland Smith, William R. Foster, and Clyde Insley Blanchard. Gregg Typing: Complete Course. 2d ed. New York : Chicago [etc.]: The Gregg Pub. Co., 1937.

MLA (8th ed.) Citation

So Relle, Rupert Pitt, et al. Gregg Typing: Complete Course. 2d ed. The Gregg Pub. Co., 1937.