CCNA Voice 640-461 Official Cert Guide and LiveLessons BundleDavid Schulz, Jeremy Cioara, Michael Valentine · First published 2012Open the Tome
CCNA voice official exam certification guideJeremy Cioara · First published 2008 · Latest edition 2012Open the Tome
Authorized self-study guideJeremy Cioara, Jeremy D. Cioara, ILSG Cisco · First published 2006Open the Tome
Cisco IP Telephony (CIPT) (Authorized Self-Study Guide)Jeremy Cioara, Cisco Systems, Inc., Inc. · First published 2006Open the Tome
