United States. Library of Congress. (1990). Library of Congress classification schedules combined with additions and changes through 1989: Class C Auxiliary sciences of history. Gale Research.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class C Auxiliary Sciences of History. Detroit: Gale Research, 1990.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1989: Class C Auxiliary Sciences of History. Gale Research, 1990.
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