Tom Nicolaas Ligthart. (1996). Development of earthworm burrow systems and the influence of earthworms on soil hydrology. Wageningen: Landbouwuniversitei te Wageningen.
Chicago Style aipamenaTom Nicolaas Ligthart. Development of Earthworm Burrow Systems and the Influence of Earthworms On Soil Hydrology. Wageningen: Landbouwuniversitei te Wageningen, 1996.
MLA aipamenaTom Nicolaas Ligthart. Development of Earthworm Burrow Systems and the Influence of Earthworms On Soil Hydrology. Wageningen: Landbouwuniversitei te Wageningen, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.