Cita APA (7a ed.)

Morrow, J., McLean, A. C., & Blaisdell, T. C. (1903). Steps in English: Book I-II. American Book Co..

Cita Chicago Style (17a ed.)

Morrow, John, A. C. McLean, y Thomas C. Blaisdell. Steps in English: Book I-II. New York ; Cincinnati [etc.]: American Book Co., 1903.

Cita MLA (8a ed.)

Morrow, John, et al. Steps in English: Book I-II. American Book Co., 1903.