Halpern, Diane F., editor
McGraw-Hill, 1963
Buku Teks
Riezky Darma Setyawan
2001
UI - Skripsi (Membership)
Brecher, Michael
Oxford University Press, 1959
Buku Teks
Page, David, editor
Oxford University Press, 1982
Buku Teks
Liu, James T. C.
Harvard University Press, 1959
Buku Teks