Strahler, A. H., & Strahler, A. (2005). Physical geography: Science and systems of the human environment (3rd ed.). New York, NY.: John Wiley & Sons.
Παραπομπή Chicago StyleStrahler, Alan H., and Arthur Strahler. Physical Geography: Science and Systems of the Human Environment. 3rd ed. New York, NY.: John Wiley & Sons, 2005.
Παραπομπή MLAStrahler, Alan H., and Arthur Strahler. Physical Geography: Science and Systems of the Human Environment. 3rd ed. New York, NY.: John Wiley & Sons, 2005.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.