APA (7th ed.) Citation

Nixdorf, M. E., Dungan, J. R., & Ruegg, R. J. (1947). Touch shorthand: Keyboard and theory, Book I. Stenograph.

Chicago Style (17th ed.) Citation

Nixdorf, Marion E., Jon R. Dungan, and Robert J. Ruegg. Touch Shorthand: Keyboard and Theory, Book I. Skokie, Ill: Stenograph, 1947.

MLA (9th ed.) Citation

Nixdorf, Marion E., et al. Touch Shorthand: Keyboard and Theory, Book I. Stenograph, 1947.