Gregory, H., & Hamilton Gregory. (2010). Public speaking for college and career. Boston: McGraw-Hill Higher Education.
Παραπομπή Chicago StyleGregory, Hamilton, και Hamilton Gregory. Public Speaking for College and Career. Boston: McGraw-Hill Higher Education, 2010.
Παραπομπή MLAGregory, Hamilton, και Hamilton Gregory. Public Speaking for College and Career. Boston: McGraw-Hill Higher Education, 2010.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.