Thompson, F.G.
Longman Scientific & Technical, 1992
Buku Teks
Zbar, Paul B., author
McGraw-Hill, 1993
Buku Referensi
Zbar, Paul B., author
Macmillan/McGraw-Hill, 1992
Buku Referensi
editor, Robert H. Perry
McGraw-Hill, 1976
Buku Referensi
McGraw-Hill, 1961
Buku Referensi