Encyclopedia of literature; Volume two
edited by Joseph T. Shipley
Philosophical Library, 1946
 Buku Referensi
Master of British literature : volume one
Houghton Miffiln, 1958
 Buku Teks
International encyclopedia of psychology : volume one
edited by Frank N. Magill
Fitzroy Dearborn Publishers, 1996
 Buku Referensi
International encyclopedia of economics : volume one
editor, Frank N. Magill
Fitzroy Dearborn Publishers, 1997
 Buku Referensi
The New complete medical and health encyclopedia; Volume one
edited by Richard J. Wagman
J.G. Ferguson Publishing, 1992
 Buku Referensi