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