Rujukan Opiliones

  1. ↑ Glauco Machado, Ricardo Pinto-da-Rocha & Gonzalo Giribet (2007). "What are harvestmen?". dalam Ricardo Pinto-da-Rocha, Glauco Machado & Gonzalo Giribet. Harvestmen: the Biology of Opiliones. Harvard University Press. m/s. 1–13. ISBN 0-674-02343-9. 
  2. ↑ J. W. Shultz (1990). "Evolutionary morphology and phylogeny of Arachnida". Cladistics. 6: 1–38. doi:10.1111/j.1096-0031.1990.tb00523.x.