Lenk, John D., author
McGraw-Hill, 1991
Buku Teks
Lenk, John D., author
McGraw-Hill, 1994
Buku Referensi
Lenk, John D., author
McGraw-Hill, 1992
Buku Referensi
edited by Ian R. Sinclair
Newnes, 1993
Buku Referensi
Huebener, Theodore, author
New York University Press, 1967
Buku Teks SO