Albrecht-Carrie, Rene
Methuen , 1970
Buku Teks
edited by V.A.C. Gatrell, Bruce Lenman, and Geoffrey Parker
Europa Publications, 1980
Buku Referensi
Laqueur, Walter Z.
Frederiock A. Praeger, 1956
Buku Teks
Laqueur, Walter
Boston Little Brown 1965
Buku Teks
Laqueur, Walter Z.
Routledge & Kegan Paul , 1959
Buku Teks