Marsh, William M., author
John Wiley & Sons, 1996
Buku Teks
Seneca, Joseph
Prentice-Hall, 1979
Buku Teks
Hidore, John J., author
Scott, Foresman, 1974
Buku Teks
Reno Aldiano, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2013
UI - Skripsi (Membership)
Fergusson, J.E., author
Pergamon Press, 1982
Buku Teks