Schweitzer, Gerald, author
John F. Rider, 1960
Buku Teks
Rosenberg, Robert, author
Holt Rinehart and Winston, 1970
Buku Teks
Stallcup, James G., author
American Technical Publishers, 1987
Buku Teks
edited by Richard H. Engelmann and William H. Middendorf
Marcel Dekker, 1995
Buku Referensi
Albrecht, Robert L.
John Wiley , 1978
Buku Teks SO