Encyclopedia of literature; Volume one
edited by Joseph T. Shipley
Philosophical Library, 1946
 Buku Referensi
International encyclopedia of psychology : volume two
edited by Frank N. Magill
Fitzroy Dearborn Publishers, 1996
 Buku Referensi
International encyclopedia of economics : volume two
editor, Frank N. Magill
Fitzroy Dearborn Publishers, 1997
 Buku Referensi
The New complete medical and health encyclopedia; Volume two
edited by Richard J. Wagman
J.G. Ferguson Publishing, 1992
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The Columbia-Viking desk encyclopedia : volume two, L-Z / compiled and edited at Columbia University by the staff of the Columbia Encyclopedia. William Bridgwater, editor-in-chief
Viking Press, 1953
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