Dyfyniad APA

Barnes, R., & Wolf, K. H. (2011). VoIP emergency calling: Foundations and practice. Wiley.

Dyfyniad Arddull Chicago

Barnes, Richard, and Karl Heinz Wolf. VoIP Emergency Calling: Foundations and Practice. Hoboken, NJ: Wiley, 2011.

Dyfyniad MLA

Barnes, Richard, and Karl Heinz Wolf. VoIP Emergency Calling: Foundations and Practice. Wiley, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.