APA (7th ed.) Citation

Treviño, S. N. (1976). Spoken Spanish. Spoken Language Services.

Chicago Style (17th ed.) Citation

Treviño, S. N. Spoken Spanish. Ithaca, N.Y: Spoken Language Services, 1976.

MLA (9th ed.) Citation

Treviño, S. N. Spoken Spanish. Spoken Language Services, 1976.