Middletown : Wesleyan University Press
Majalah, Jurnal, Buletin
edited by Gordon Greenwood
Angus and Robertson, 1955
Buku Teks
edited by Gordon Greenwood
Angus and Robertson, 1969
Buku Teks
edited by Isaac Kramnick
[publisher not identified], 1969
Buku Teks
Wanlass, Lawrence C., author
Appleton-Century-Crofts, 1953
Buku Teks