edited by John F. Griffith
Oxford University Press, 1994
Buku Referensi
Donn, William L.
McGraw-Hill, 1965
Buku Teks
Battan, Louis J.
Prentice-Hall, 1979
Buku Teks
Cole, Franklyn W.
John Wiley & Sons, 1980
Buku Teks
Petterssen, Sverre
McGraw-Hill, 1958
Buku Teks