Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1959
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Cornel University Press, 1955
Buku Teks
Ritchie, Donald A., author
Macmillan, 1985
Buku Teks
edited by Keith Michael Baker, Steven Laurence Kaplan
Duke University Press, 1997
Buku Teks
Roll, Eric
Prentice-Hall, 1959
Buku Teks