Havard-Williams, P., Koops, W. R. H., & Heaney, H. J. (1972). IFLA annual 1971: Proceedings of the general council annual reports ([1st ed.].). Scandinavian Library Center.
Citácia podle Chicago (17th ed.)Havard-Williams, P., W. R. H. Koops, a H. J. Heaney. IFLA Annual 1971: Proceedings of the General Council Annual Reports. [1st ed.]. Copenhagen: Scandinavian Library Center, 1972.
Citácia podľa MLA (8th ed.)Havard-Williams, P., et al. IFLA Annual 1971: Proceedings of the General Council Annual Reports. [1st ed.]. Scandinavian Library Center, 1972.
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