Day, Arthur R
Wesview Press, 1986
Buku Teks
Kriesberg, Louis., author
Rowman & Littlefield , 2012
Buku Teks
Wa Ode Dewi Astati Pameri, author
2017
UI - Tesis (Membership)
Kostiner, Edward
Barron's Educational Series Inc. , 1992
Buku Teks
LIppincott Williams & Wilkins, 2003
Buku Teks