Cita APA (7a ed.)

Harrington, W. L., & Harrington, C. J. (1904). A first book for non-English-speaking people. D.C. Heath & Co..

Cita Chicago Style (17a ed.)

Harrington, Walter Leo, y Catharine J. Harrington. A First Book for Non-English-speaking People. Boston : New York [etc.]: D.C. Heath & Co., 1904.

Cita MLA (8a ed.)

Harrington, Walter Leo, y Catharine J. Harrington. A First Book for Non-English-speaking People. D.C. Heath & Co., 1904.