APA (7th ed.) Citation

Koops, W. R. H., & Wieder, J. IFLA's first fifty years: Achievement and challenge in international librarianship.

Chicago Style (17th ed.) Citation

Koops, W. R. H., and Joachim Wieder. IFLA's First Fifty Years: Achievement and Challenge in International Librarianship.

MLA (9th ed.) Citation

Koops, W. R. H., and Joachim Wieder. IFLA's First Fifty Years: Achievement and Challenge in International Librarianship.

Warning: These citations may not always be 100% accurate.