Helal, A. H., & Weiss, J. W. (1991). Information Technology and Library Management. Festschrift in Honour of Margaret Beckman. Papers Presented at the International Essen Symposium (13th, Essen, West Germany, October 22-25, 1990).
Chicago-Zitierstil (17. Ausg.)Helal, Ahmed H., und Joachim W. Weiss. Information Technology and Library Management. Festschrift in Honour of Margaret Beckman. Papers Presented at the International Essen Symposium (13th, Essen, West Germany, October 22-25, 1990). 1991.
MLA-Zitierstil (9. Ausg.)Helal, Ahmed H., und Joachim W. Weiss. Information Technology and Library Management. Festschrift in Honour of Margaret Beckman. Papers Presented at the International Essen Symposium (13th, Essen, West Germany, October 22-25, 1990). 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.