APA (7th ed.) Citation

Lucas, C., Valli, C., & Bayley, R. (2003). What's your sign for pizza?: An introduction to variation in American Sign Language. Gallaudet University Press.

Chicago Style (17th ed.) Citation

Lucas, Ceil, Clayton Valli, and Robert Bayley. What's Your Sign for Pizza?: An Introduction to Variation in American Sign Language. Washington, D.C: Gallaudet University Press, 2003.

MLA (9th ed.) Citation

Lucas, Ceil, et al. What's Your Sign for Pizza?: An Introduction to Variation in American Sign Language. Gallaudet University Press, 2003.