Hirko, B., & Ross, M. B. (2004). Virtual reference training: The complete guide to providing anytime, anywhere answers. American Library Association.
Lua i Stíl Chicago (17ú heag.)Hirko, Buff, agus Mary Bucher Ross. Virtual Reference Training: The Complete Guide to Providing Anytime, Anywhere Answers. Chicago: American Library Association, 2004.
Lua MLA (9ú heag.)Hirko, Buff, agus Mary Bucher Ross. Virtual Reference Training: The Complete Guide to Providing Anytime, Anywhere Answers. American Library Association, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.