Vandenburgh III, Edward C.
The Bobbs-Merill Company,Inc., 1968
Buku Teks
Davies, Jack
West Publishing, 1975
Buku Teks
Wood, William
Percival Marshall, 1949
Buku Teks
Gould, William B., IV
MIT Press, 1982
Buku Teks
Rosenberg, Peter D.
Clark Boardman, 1975
Buku Teks