Tebbel, John William
Otterbein Press, 1963
Buku Teks
Rissyelly, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2010
UI - Tesis (Open)
Hook, Sidney, author
Yayasan Obor Indonesia, 1994
Buku Teks
Roberts, Don D.
Mouton, 1973
Buku Teks
Symons, Julian, author
Arthur Barker, 1951
Buku Teks