Ehrlich, Paul R.
W.H. Freeman, 1970
Buku Teks SO
Asia, Yogyakarta, Indonesia, 1974
Buku Teks
edited by Brian Tierney, Donald Kagan and L. Pearce Williams; consulting editor, Eugene Rice
Random House, 1968
Buku Teks SO
Weeks, John Robert, 1944-
Cengage Learning, 2016
Buku Teks SO
Weeks, John Robert, 1944-
Wadsworth, 1986
Buku Teks SO