Edited by Cecilia Genereux, Paul D. Moeller
Libraries Unlimited, 2009
Buku Referensi
Afdeling Agrarische Geschiedenis, Landbouwhogeschool
Wageningen, 1985
Buku Teks
edited by Suzanne McMahon; Miriam Palm; Pam Dunn
The Haworth Press, Inc., 1991
Buku Teks
Heath, Robert W.
Harper and Row, 1964
Buku Teks
Lane, Alfred H.
Aldwych Press, 1980
Buku Referensi