Freeman, T.W., author
Hutchinson University Library, 1974
Buku Teks
Stamp, Laurence Dudley, 1898-1966, author
Penguin Books, 1960
Buku Teks
Wheeler, James O., author
John Wiley & Sons, 1986
Buku Teks
Hall, Tim, 1968-, author
Routledge, 2018
Buku Teks
Northam, Ray M., author
John Wiley & Sons, 1979
Buku Teks