Cita APA (7th ed.)

Fries, C. C. (1940). American english grammar. D. Appleton-Century.

Cita Chicago (17th ed.)

Fries, Charles Carpenter. American English Grammar. Nueva York: D. Appleton-Century, 1940.

Cita MLA (9th ed.)

Fries, Charles Carpenter. American English Grammar. D. Appleton-Century, 1940.