Sober, Elliott, author
Westview Press, 1993
Buku Teks
Kathryn S. Plaisance
Springer, 2012
eBooks
Allen, Colin
MIT Press , 1997
Buku Teks
Peter H. Raven
McGraw-Hill, Higher Education, 2008
Buku Teks
Mader, Sylvia S., author
McGraw-Hill , 1998
Buku Teks