Weyl, Walter E.
N.Y. Harper & Row , 1964
Buku Teks
Mason, Alpheus Thomas,1899-1989, author
Prentice-Hall, 1959
Buku Teks
Gettell, Raymond G.
Appleton-Century-Crofts, 1928
Buku Teks
Arum Puspita Windiantari, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2006
UI - Skripsi (Membership)
Neal, Harry Edward, author
Julian Messner, 1967
Buku Teks