Powell, C. A., & Bradigan, P. S. (2001). E-Mail Reference Services: Characteristics and Effects on Overall Reference Services at an Academic Health Sciences Library.
Chicago-Zitierstil (17. Ausg.)Powell, Carol A., und Pamela S. Bradigan. E-Mail Reference Services: Characteristics and Effects on Overall Reference Services at an Academic Health Sciences Library. 2001.
MLA-Zitierstil (9. Ausg.)Powell, Carol A., und Pamela S. Bradigan. E-Mail Reference Services: Characteristics and Effects on Overall Reference Services at an Academic Health Sciences Library. 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.