File:Diplodocus Species Size Comparison.svg
Carpenter, K. (2006). "Biggest of the big: a critical re-evaluation of the mega-sauropod Amphicoelias fragillimus." In Foster, J.R. and Lucas, S.G., eds., 2006, Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36: 131–138.
Scott A. Hartman "The biggest of the big". Skeletaldrawing.com. June 14, 2013. Retrieved April 29, 2019