Yapp, N., Brinkley, D., & Johns, C. (2007). 100 days in photographs: Pivotal events that changed the world. National Geographic and Getty images.
Lua i Stíl Chicago (17ú heag.)Yapp, Nicholas, Douglas(Foreword) Brinkley, agus Chris(Intro.) Johns. 100 Days in Photographs: Pivotal Events That Changed the World. Washington: National Geographic and Getty images, 2007.
Lua MLA (9ú heag.)Yapp, Nicholas, et al. 100 Days in Photographs: Pivotal Events That Changed the World. National Geographic and Getty images, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.