U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Runchock, R., & Droste, K. (1989). Class E-F. History: America: Library of Congress classification schedules combined with additions and changes through 1988. Gale Research Inc.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)U.S. Library of Congress. Subject Cataloging Division, Gale Research Inc, Rita Runchock, và Kathleen Droste. Class E-F. History: America: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Detroit, Michigan: Gale Research Inc, 1989.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)U.S. Library of Congress. Subject Cataloging Division, et al. Class E-F. History: America: Library of Congress Classification Schedules Combined with Additions and Changes Through 1988. Gale Research Inc, 1989.