APA (7th ed.) Citation

Helal, A. H., & Weiss, J. W. (1992). Innovation for information: International contributions to librarianship. Universitätsbibliothek Essen.

Chicago Style (17th ed.) Citation

Helal, A. H., and J. W. Weiss. Innovation for Information: International Contributions to Librarianship. Essen: Universitätsbibliothek Essen, 1992.

MLA (9th ed.) Citation

Helal, A. H., and J. W. Weiss. Innovation for Information: International Contributions to Librarianship. Universitätsbibliothek Essen, 1992.