Cita APA (7th ed.)

Orion, G. F. (1997). Pronouncing american english: Sounds, stress, and intonation (2a. ed.). Heinle & Heinle.

Cita Chicago (17th ed.)

Orion, Gertrude F. Pronouncing American English: Sounds, Stress, and Intonation. 2a. ed. Boston: Heinle & Heinle, 1997.

Cita MLA (9th ed.)

Orion, Gertrude F. Pronouncing American English: Sounds, Stress, and Intonation. 2a. ed. Heinle & Heinle, 1997.