Nota Hamburger

  1. ↑ "Hamburger" Oxford English Dictionary Online 2nd ed 1989
  2. ↑ "hamburger." Webster's Third New International Dictionary, Unabridged. Merriam-Webster, 2002. http://unabridged.merriam-webster.com
  3. 1 2 Infiniti (edisi 66). Tahukah Anda. 2014. m/s. 9. ISBN 9771985943064 Check |isbn= value: invalid prefix (bantuan).  Parameter |month= tidak diketahui diabaikan (bantuan); |access-date= memerlukan |url= (bantuan)
  4. 1 2 Cooper, Jeanne (4 Jun 2006). "Did you know?". San Francisc Chronicle. San Francisco.