Crisis,proverty and agriculture in indonesia Peter G.Warr
 Artikel Jurnal
Jahne, Johannes, author
Construction of roads and tracks in rural areas
Leipzig, 1964
 Buku Teks
Two blades of grass: rural cooperatives in agricultural modernization / edited by Peter Worsley
Manchester University Press, 1971
 Buku Teks
Agroecology / edited by C. Ronald Carroll, John H. Vandermeer, Peter Rosset.
McGraw-Hill, 1990
 Buku Teks
Finance : the New Palgrave / edited by John Eatwell, Murray Milgate, Peter Newman
W.W. Norton & Co., 1989
 Buku Teks