Teed, Peter, author
Oxford University Press , 1992
Buku Referensi
Adams, James Truslow, author
1946
Buku Referensi
edited by W.F. Bynum, E.J. Browne, Roy Porter
Macmillan Reference Books, 1989
Buku Referensi
Lincoln, Roger J., author
Cambridge University Press, 1990
Buku Referensi
edited by Lance Day and Ian McNeil
Roudledge, 1996
Buku Referensi