Bonvillian, J. D., & Nelson-Metlay, V. (2020). Simplified signs: A manual sign-communication system for special populations. Open Book Publishers.
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Dyfyniad Arddull Chicago
Bonvillian, John D., and Val Nelson-Metlay. Simplified Signs: A Manual Sign-communication System for Special Populations. Cambridge, England: Open Book Publishers, 2020.
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Dyfyniad MLA
Bonvillian, John D., and Val Nelson-Metlay. Simplified Signs: A Manual Sign-communication System for Special Populations. Open Book Publishers, 2020.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.