APA (7th ed.) Citation

Heard, S. D., King, M. W., & Prittie, E. J. (1933). Stories of American explorers and settlers. John C. Winston Co.

Chicago Style (17th ed.) Citation

Heard, Sarah Dow, Morrill Whitney King, and Edwin John Prittie. Stories of American Explorers and Settlers. Philadelphia, Chicago [etc.]: John C. Winston Co, 1933.

MLA (8th ed.) Citation

Heard, Sarah Dow, et al. Stories of American Explorers and Settlers. John C. Winston Co, 1933.