Cita APA (7a ed.)

Gibbons, H., & Cook, C. R. (1941). We read, write, speak and spell. Educational Pub..

Cita Chicago Style (17a ed.)

Gibbons, Helen, y Clara R. Cook. We Read, Write, Speak and Spell. Minneapolis ; Nashville [etc.]: Educational Pub., 1941.

Cita MLA (8a ed.)

Gibbons, Helen, y Clara R. Cook. We Read, Write, Speak and Spell. Educational Pub., 1941.