May, Gary S.
John Wiley & Sons, 2004
Buku Teks
Yang, Edward S., author
McGraw-Hill, 1978
Buku Teks
Lindmayer, Joseph, author
Prentice-Hall, 1955
Buku Teks
edited by J. Narayan, T.Y. Tan
North-Holland, 1981
Buku Teks
Surina, Tugomir, author
Holt, Rinehart and Winston, 1964
Buku Teks