Appleton-Century-Crofts, 1951
Buku Teks
Kelley, Donald R., author
Harvard University Press, 1990
Buku Teks
Hayes, Carlton J.
Macmillan, 1956
Buku Teks
Cairns, John C.
Free Press, 1965
Buku Teks
Marwati Djoened Poesponegoro, author
Erlangga, 1982
Buku Teks