Rujukan Oak

  1. ↑ Sunset Western Garden Book, 1995, Leisure Arts, pp. 606–607, ISBN 0376038519.
  2. ↑ Hogan, C. Michael (2012) Oak Diarkibkan 23 May 2013 di Wayback Machine.. ed.
  3. ↑ Tull, Delena (1999-01-01). Edible and Useful Plants of Texas and the Southwest: A Practical Guide (dalam bahasa Inggeris). University of Texas Press. ISBN 9780292781641. 
  4. ↑ Hipp, Andrew (2004). Oak Trees Inside and Out. Rosen Publishing Group, Inc. m/s. 4. 
  5. ↑ Baugh, Daniel A. (1965). British Naval Administration in the Age of Walpole. Princeton University Press. m/s. 242. OCLC 610026758. 
  6. ↑ Cheese. swaledalecheese.co.uk
  7. ↑ Bainbridge, D. A. (12–14 November 1986), Use of acorns for food in California: past, present and future, San Luis Obispo, CA.: Symposium on Multiple-use Management of California's Hardwoods 
  8. ↑ Schierz, Kai Uwe (2004). "Von Bonifatius bis Beuys, oder: Vom Umgang mit heiligen Eichen". dalam Hardy Eidam; Marina Moritz; Gerd-Rainer Riedel; Kai-Uwe Schierz. Bonifatius: Heidenopfer, Christuskreuz, Eichenkult (dalam bahasa Jerman). Stadtverwaltung Erfurt. m/s. 139–45. 
  9. ↑ "Oak Trees". arborday.org. Dicapai 27 April 2010. 
  10. ↑ "Oak as a Symbol". Venables Oak. Dicapai 26 September 2012.