Twentieth century authors : a biographical dictionary of modern literature
edited by Stanley J. Kunitz and Vineta Colby
H.W. Wilson, 1963
 Buku Referensi
Twentieth century authors : a biographical dictionary of modern literature
edited by Stanley J. Kunitz and Howard Haycraft
H.W. Wilson, 1950
 Buku Referensi
One hundred twentieth-century philosophers
edited by Stuart C. Brown, Diane Collinson, Robert Wilkinson
Routledge, 1998
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Teed, Peter
A dictionary of twentieth century history 1914-1990
Oxford University Press , 1992
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Cohen, J.M. (John Michael), 1903-1989
The Penguin dictionary of twentieth-century quotations
Viking, 1993
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