International Federation of Library Associations and Institutions. Section on Classification and Indexing, Instituto da Biblioteca Nacional e do Livro (Portugal), Holley, R. P., McGarry, D., Duncan, D., & Svenonius, E. (2017). Subject indexing: principles and practices in the 90's: Proceedings of the IFLA satellite meeting held in Lisbon, Portugal, 17-18 August 1993, and sponsored by the IFLA Section on Classification and Indexing and the Instituto da Biblioteca Nacional e do LIVRO, lisbon, Portugal. De Gruyter, Inc..
Style de citation Chicago (17e éd.)International Federation of Library Associations and Institutions. Section on Classification and Indexing, Instituto da Biblioteca Nacional e do Livro (Portugal), Robert P. Holley, Dorothy McGarry, Donna Duncan, et Elaine Svenonius. Subject Indexing: Principles and Practices in the 90's: Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and Sponsored by the IFLA Section on Classification and Indexing and the Instituto Da Biblioteca Nacional E Do LIVRO, Lisbon, Portugal. Boston: De Gruyter, Inc., 2017.
Style de citation MLA (8e éd.)International Federation of Library Associations and Institutions. Section on Classification and Indexing, et al. Subject Indexing: Principles and Practices in the 90's: Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and Sponsored by the IFLA Section on Classification and Indexing and the Instituto Da Biblioteca Nacional E Do LIVRO, Lisbon, Portugal. De Gruyter, Inc., 2017.