Tham khảo Giun_đất

  1. ↑ Edwards, Clive A.; Lofty, J. R. (1977). Biology of Earthworms. London: Chapman & Hall. tr. preface. ISBN 0-412-14950-8. 
  2. ↑ Coleman, David C.; Crossley, D.A.; Hendrix, Paul F. (2004). Fundamentals of Soil Ecology. Amsterdam; Boston: Elsevier Academic Press. tr. 170. ISBN 0-12-179726-0. 
  3. ↑ Bonkowski, Griffiths, and Ritz (tháng 11 năm 2000). “Food preferences of earthworms for soil fungi”. Pedobiologia 44–6 (6): 667. doi:10.1078/S0031-4056(04)70080-3. 
  4. ↑ Lofty, Clive A.; Lofty, J. R. (1977). Biology of Earthworms. London: Chapman & Hall. tr. 80. ISBN 0-412-14950-8. 
  5. ↑ Edwards, Clive A.; Lofty, J.R. (1977). Biology of Earthworms. London: Chapman & Hall. tr. 19. ISBN 0-412-14950-8.