Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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