Biggs, John B.
McGraw-Hill, 2011
Buku Teks
Walker, Melanie
Open University Press, 2004
Buku Teks
Evans, Norman, 1923-
Routledge, 2001
Buku Teks
edited by Heather Fry, Steve Ketteridge and Stephanie Marshall
Routledge, 2009
Buku Referensi
Fortunato, Ray T.
Jossey-Bass, 1981
Buku Teks