APA (7th ed.) Citation

Lyman, R. L. V., Johnson, R. I., & Bear, M. V. (1934). Directed language practice. Ginn.

Chicago Style (17th ed.) Citation

Lyman, Rollo La Verne, Roy Ivan Johnson, and Mata Virginia Bear. Directed Language Practice. Boston: Ginn, 1934.

MLA (8th ed.) Citation

Lyman, Rollo La Verne, et al. Directed Language Practice. Ginn, 1934.