Waterston, Albert
John Hopkins University Press, 1969
Buku Teks
Luning, H.A.
SoutheEast Asian Regional Center for Graduate Study and Research in Agriculture , 1891
Buku Teks
Norton, George W.
McGraw-Hill, 1993
Buku Teks
Mellor, John W.
Cornell University Press, 1966
Buku Teks
edited by Melvin G. Blase
Iowa State University Press, 1971
Buku Teks