Jackson, Peter, author
Routledge, 1995
Buku Teks
Spencer, J.E., author
John Wiley & Sons, 1969
Buku Teks
Crang, Mike, author
Routledge, 1998
Buku Teks
Bennison, George Mills, author
Routledge, 2013
Buku Teks
Getis, Arthur, author
McGraw-Hill Higher Education, 2009
Buku Teks