(1989). Library of Congress Classification. Class Q. Science (7th ed.). Washington: : The Library of Congress.
Chicago Style CitationLibrary of Congress Classification. Class Q. Science. 7th ed. Washington: : The Library of Congress, 1989.
MLA CitationLibrary of Congress Classification. Class Q. Science. 7th ed. Washington: : The Library of Congress, 1989.
Warning: These citations may not always be 100% accurate.