edited by J.R. Landon
Longman Scientific & Technical, 1984
Buku Referensi
Anderson, J. M., editor
CAB International, 1993
Buku Referensi
edited by D.J. Greenland and R. Lal
John Wiley & Sons, 1979
Buku Teks
Kezdi, Arpard, author
Elsevier, 1980
Buku Referensi
Van Dersel, William Richard, author
Oxford University Press, 1946
Buku Teks