Martin, David, author
Routledge , 1996
Buku Teks
Mader, Chris, author
Science Research Associates , 1974
Buku Teks
edited by Mary Feeney
Taylor Graham, 1986
Buku Referensi
Haag, Stephen, author
McGraw-Hill, 2010
Buku Teks
Haag, Stephen, author
Irwin McGraw-Hill, 1998
Buku Referensi