edited by Ivan Hill
Frederick A. Praeger, 1980
Buku Teks
Maidment, Frederick, author
Prentice-Hall, 1999
Buku Teks
Maidment, Frederick, author
Prentice-Hall, 2000
Buku Teks
Bradley, F.H., author
Clarendon Press, 1959
Buku Teks
edited by Hugh LaFollette and Ingmar Persson
Wiley Blackwell, 2013
Buku Teks