Hammond, Peter, author
Macmillan, 1978
Buku Teks
Peoples, James G., author
Cengage Learning, 2018
Buku Teks
Bock, Philip K., author
Alfred A. Knopf, 1969
Buku Teks
Rosman, Abraham, author
Random House, 1989
Buku Teks
Johnson, Allen W.
Stanford Univ. Press, 1978
Buku Teks