อ้างอิง ของ Passer

  1. Bledsoe, A. H.; Payne, R. B. (1991). Forshaw, Joseph, ed. Encyclopaedia of Animals: Birds. London: Merehurst Press. p. 222. ISBN 978-1-85391-186-6.
  2. Groschupf, Kathleen (2001). "Old World Sparrows". In Elphick, Chris; Dunning, Jr., John B.; Sibley, David. The Sibley Guide to Bird Life and Behaviour. London: Christopher Helm. pp. 562–564. ISBN 978-0-7136-6250-4.CS1 maint: Uses editors parameter (link)
  3. 1 2 Summers-Smith, J. D. (1990). "Changes in distribution and habitat utilisation by members of the genus Passer". In Pinowski, J.; and Summers-Smith, J. D. Granivorous birds in the agricultural landscape. Warszawa: Pánstwowe Wydawnictom Naukowe. pp. 11–29. ISBN 978-83-01-08460-8.CS1 maint: Uses editors parameter (link)