Clark, John R., author
Lewis Publishers, 1996
Buku Referensi
Beatley, Timothy, author
University California Press, 2003
Buku Teks
Dobby, E.H.G. (Ernest Henry George), 1906-1981, author
University of London Press, 1950
Buku Teks
Dobby, E.H.G. (Ernest Henry George), 1906-1981, author
University of London Press, 1953
Buku Teks
Henderson, William, author
MIT Press, 1963
Buku Teks