U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Runchock, R., & Droste, K. (1989). Class G. Geography, maps, anthropology, recreation: Library of Congress classification schedules combined with additions and changes through 1988. Gale Research Inc.
Cita Chicago Style (17a ed.)U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Rita Runchock, y Kathleen Droste. Class G. Geography, Maps, Anthropology, Recreation: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Detroit, Michigan: Gale Research Inc, 1989.
Cita MLA (9a ed.)U.S. Library of Congress. Subject Cataloging Division, et al. Class G. Geography, Maps, Anthropology, Recreation: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Gale Research Inc, 1989.