Spiegelman, Mortimer
Harvard University Press, 1968
Buku Teks
Pressat, Roland
Methuen, 1966
Buku Teks
Hollingsworth, T.H.
Cornell University Press, 1969
Buku Teks
Shryock, Henry S.
Academic press, 1976
Buku Teks
Smith, T. Lynn
F.A. Davis, 1970
Buku Teks