Books, R. T. (1974). A Guide to The Natural World and Index to The Life Nature Library. Time-Life Books.
Chicago Style (17th ed.) CitationBooks, Red. Time-Life. A Guide to The Natural World and Index to The Life Nature Library. Time-Life Books, 1974.
MLA (8th ed.) CitationBooks, Red. Time-Life. A Guide to The Natural World and Index to The Life Nature Library. Time-Life Books, 1974.
Warning: These citations may not always be 100% accurate.