Basil Gomez and John Paul Jones III, edited
Wiley-Blackwell, 2010
Buku Teks
Hammersley, Martyn, author
Longman , 1990
Buku Teks
LoBiondo-Wood, Geri, author
Mosby, 1986
Buku Teks
edited by John Corner, Philip Schlesinger and Roger Silverstone
Routledge , 1997
Buku Teks
Salter, Leonard A., author
University of Wisconsin Press, 1967
Buku Teks