Dyfyniad APA
Abbott, D. A., Cooper, J., & Sheets, P. D. (2012). Surviving sudden environmental change: Answers from archaeology. University Press of Colorado.
Dyfyniad Arddull Chicago
Abbott, David A., Jago Cooper, and Payson D. Sheets. Surviving Sudden Environmental Change: Answers from Archaeology. Boulder, Colo.: University Press of Colorado, 2012.
Dyfyniad MLA
Abbott, David A., et al. Surviving Sudden Environmental Change: Answers from Archaeology. University Press of Colorado, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.