Chard, Chester S.
McGraw-Hill, 1975
Buku Teks
Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks
Murdock, George Peter, author
McGraw-Hill, 1959
Buku Teks
edited by Phillis M. Martin and Patrick O'Meara
Indiana University Press, 1995
Buku Teks
Lasky, Melvin J.
J.B. Lippincott Company, 1962
Buku Teks