Robinson, Vester
Reston Publishing Company, 1974
Buku Referensi
Genn, Robert C.
Parker Publishing Company, 1977
Buku Referensi
Genn, Robert C.
Parker Publishing Company, 1977
Buku Referensi
Brombacher, A.C.
John Wiley & Sons, 1992
Buku Teks
Lenk, John D.
McGraw-Hill, 1995
Buku Referensi