edited by Geoffrey Hawthorn
Frank Cass, 1978
Buku Teks
Alexandersson, Gunnar
Joh Wiley & Sons , 1963
Buku Teks
Nils-Goran Olve, author
John Wiley & Sons, 2003
Buku Teks
Cipolla, Carlo M., author
Penguin, 1974
Buku Teks
Borrie, W.B., author
Weidenfeld and Nicolson, 1970
Buku Teks