APA (7th ed.) Citation

Insight Media (Firm), Summer Institute of Linguistics, Dallas Center Media (Firm), Morgan, M., Lyons, J., & Rudy, K. (1987). The sociolinguistics of language. Insight Media.

Chicago Style (17th ed.) Citation

Insight Media (Firm), Summer Institute of Linguistics, Dallas Center Media (Firm), Mary Morgan, Jeff Lyons, and Ken Rudy. The Sociolinguistics of Language. New York, NY: Insight Media, 1987.

MLA (9th ed.) Citation

Insight Media (Firm), et al. The Sociolinguistics of Language. Insight Media, 1987.