Dornbusch, Sanford M.
McGraw-Hill, 1955
Buku Teks
Hodges, Harold M., author
Harper and Row, 1971
Buku Teks
Bart, Pauline
Random House, 1986
Buku Teks
Hastrup, Kirsten, author
Routledge, 1995
Buku Teks
Fried, Charles
Harvard University Press, 1970
Buku Teks