APA (7th ed.) Citation

FROMKLIN, V., BLAIR, D., & COLLINS, P. (1999). An introduction to language.-- ed.4. Harcourt.

Chicago Style (17th ed.) Citation

FROMKLIN, Victoria, David BLAIR, and Peter COLLINS. An Introduction to Language.-- Ed.4. Sydney: Harcourt, 1999.

MLA (9th ed.) Citation

FROMKLIN, Victoria, et al. An Introduction to Language.-- Ed.4. Harcourt, 1999.