Lucas, C., Valli, C., & Bayley, R. (2003). What's Your Sign for Pizza?: An Introduction to Variation in American Sign Language. Gallaudet University Press.
Cita Chicago Style (17a ed.)Lucas, Ceil, Clayton Valli, y Robert Bayley. What's Your Sign for Pizza?: An Introduction to Variation in American Sign Language. Washington, D.C: Gallaudet University Press, 2003.
Cita MLA (8a ed.)Lucas, Ceil, et al. What's Your Sign for Pizza?: An Introduction to Variation in American Sign Language. Gallaudet University Press, 2003.
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