Lenk, John D.
McGraw-Hill, 1994
Buku Referensi
Lenk, John D.
McGraw-Hill, 1992
Buku Referensi
edited by Ian R. Sinclair
Newnes, 1993
Buku Referensi
Huebener, Theodore
New York University Press, 1967
Buku Teks SO
Tremaine, Howard M.
Howard W. Sams & Co., 1959
Buku Teks