Whitaker, Ellen, author
Taunton Press, 1999
Buku Referensi
Steward, Elbert W
McGraw-Hill, 1972
Buku Teks
Preuss, Harry, author
Broadway Books, 2007
Buku Teks
Ari Suryandari, author
Program Pascasarjana Universitas Indonesia, 2007
UI - Tesis (Membership)
Sawyer, R. Keith (Robert Keith), author
Wiley, 2013
Buku Teks