Mishan, E.J.
George Allen and Unwin, 1976
Buku Teks
Rus, Gines de, author
Edward Elgar, 2010
Buku Teks
Purba, Radiks, author
Rineka Cipta, 1997
Buku Teks
Curry, Steve, author
St. Martin's Press , 1993
Buku Teks
Frost, Michael J.
Gower Press, 1971
Buku Teks