Hulshoff Pol, L. (1989). The phenomenon of granulation of anaerobic sludge. Landbouwuniversiteit te Wageningen?.
Lua i Stíl Chicago (17ú heag.)Hulshoff Pol, Look. The Phenomenon of Granulation of Anaerobic Sludge. [Wageningen, The Netherlands?: Landbouwuniversiteit te Wageningen?, 1989.
Lua MLA (8ú heag.)Hulshoff Pol, Look. The Phenomenon of Granulation of Anaerobic Sludge. Landbouwuniversiteit te Wageningen?, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.