APA (7th ed.) Citation

Walton, S. (2018). Sons & Lettres: A pronunciation method for intermediate-level French. Portland State University Library.

Chicago Style (17th ed.) Citation

Walton, Stephen. Sons & Lettres: A Pronunciation Method for Intermediate-level French. [Place of publication not identified]: Portland State University Library, 2018.

MLA (9th ed.) Citation

Walton, Stephen. Sons & Lettres: A Pronunciation Method for Intermediate-level French. Portland State University Library, 2018.