Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

Gibbons, Helen, e Clara R. Cook. We Read, Write, Speak and Spell. Minneapolis Nashville Philadelphia: Educational Publishers INC, 1941.

Citatione MLA (9a ed.)

Gibbons, Helen, e Clara R. Cook. We Read, Write, Speak and Spell. Educational Publishers INC, 1941.