Bendixen, Alfred, author
Wiley-Blackwell, 2010
Buku Teks
Collins, Aukai, author
Hikmah , 2006
Buku Teks
Risebero, Bill, author
MIT Press, 2001
Buku Teks
Moon, Glenn W., author
Holt, Rinehart and Winston, 1964
Buku Teks
Ferraro, Geraldine, author
Bantam Books, 1985
Buku Teks