Cortina, J., & Elder, J. Opening doors: Understanding college reading. Boston: McGraw-Hill.
Παραπομπή Chicago StyleCortina, Joe., και Janet Elder. Opening Doors: Understanding College Reading. Boston: McGraw-Hill.
Παραπομπή MLACortina, Joe., και Janet Elder. Opening Doors: Understanding College Reading. Boston: McGraw-Hill.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.