APA (7th ed.) Citation

Wolfram, W., & Schilling-Estes, N. (1998). American English: Dialects and variation. Blackwell.

Chicago Style (17th ed.) Citation

Wolfram, Walt, and Natalie Schilling-Estes. American English: Dialects and Variation. Malden [etc.]: Blackwell, 1998.

MLA (9th ed.) Citation

Wolfram, Walt, and Natalie Schilling-Estes. American English: Dialects and Variation. Blackwell, 1998.