APA-ийн эшлэл(7 дахь хэвлэлт)

Bonvillian, J. D., & Nelson-Metlay, V. (2020). Simplified signs: A manual sign-communication system for special populations. OpenBook Publishers.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Bonvillian, John D., ба Val Nelson-Metlay. Simplified Signs: A Manual Sign-communication System for Special Populations. Cambridge, England: OpenBook Publishers, 2020.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Bonvillian, John D., ба Val Nelson-Metlay. Simplified Signs: A Manual Sign-communication System for Special Populations. OpenBook Publishers, 2020.