Bell, M., Walker, M. J. C., & Walker, M. J. C. (2005). Late quaternary environmental change: Physical and human perspectives (2nd ed.). Harlow: Pearson Education Limited.
Παραπομπή Chicago StyleBell, M., M. J. C. Walker, and Mike J. C. Walker. Late Quaternary Environmental Change: Physical and Human Perspectives. 2nd ed. Harlow: Pearson Education Limited, 2005.
Παραπομπή MLABell, M., M. J. C. Walker, and Mike J. C. Walker. Late Quaternary Environmental Change: Physical and Human Perspectives. 2nd ed. Harlow: Pearson Education Limited, 2005.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.