Gaya APA

BEEK, K, J, B, P, A, M, D, E. (1987). Proceedings of the international workshop on quantified land evaluation procedures held in Washington DC 27 April - 2 May 1986 . : ITC.

Gaya MLA

BEEK, Klaas, Jan;, BURROUGH,, Peter, A.;, McCORMACK,, Donald, E.. "Proceedings of the international workshop on quantified land evaluation procedures held in Washington DC 27 April - 2 May 1986". : ITC, 1987. Laporan.