Hubbard, L. S. (1981). Book publishers directory. A guide to new and established, private and special interest, avant-garde and alternative, organization and association, government and institution presses (3rd ed.). Gale Research.
Citace podle Chicago (17th ed.)Hubbard, Linda S. Book Publishers Directory. A Guide to New and Established, Private and Special Interest, Avant-garde and Alternative, Organization and Association, Government and Institution Presses. 3rd ed. Detroit: Gale Research, 1981.
Citace podle MLA (9th ed.)Hubbard, Linda S. Book Publishers Directory. A Guide to New and Established, Private and Special Interest, Avant-garde and Alternative, Organization and Association, Government and Institution Presses. 3rd ed. Gale Research, 1981.
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