Rujukan Turus

  1. ↑ "Column - Definition and More from the Free Merriam-Webster Dictionary". Merriam-webster.com. 2012-08-31. Diarkibkan daripada yang asal pada 2013-10-04. Dicapai 2013-07-04. 
  2. ↑ Hewson Clarke and John Dougall, The Cabinet of Arts, T. Kinnersley, London (1817), pp. 271, 272.
  3. ↑ "Architectural Glossary", in The Universal Decorator, Francis Benjamin Thompson, Ed., vol. III (1859).
  4. ↑ J. Ward-Perkins, "The shrine of St. Peter's and its twelve spiral columns" Journal of Roman Studies 42 (1952) p 21ff.
  5. ↑ Sanseverino, Hilary Costa (1983). "Archaeological Remains on the Southern Somali Coast". Azania: Archaeological Research in Africa. 18 (1): 151–164. doi:10.1080/00672708309511319. Dicapai 11 November 2014.