Hulshoff Pol, L. (1989). The phenomenon of granulation of anaerobic sludge. Landbouwuniversiteit te Wageningen?.
Dyfyniad Arddull ChicagoHulshoff Pol, Look. The Phenomenon of Granulation of Anaerobic Sludge. [Wageningen, The Netherlands?: Landbouwuniversiteit te Wageningen?, 1989.
Dyfyniad MLAHulshoff Pol, Look. The Phenomenon of Granulation of Anaerobic Sludge. Landbouwuniversiteit te Wageningen?, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.