... formerly disputed whether the correct article is a or an with historian, historic, and a few other words. The traditional rule is that if the h- is sounded, a is the proper form. Most people following ... chances to rob the stranger." A or An? According to The Oxford Dictionary of American Usage and Style, "The indefinite article a is used before words beginning with a consonant sound, ... other form, an, is used before words beginning with a vowel sound. Hence, a European country, a Ouija board, a uniform, an FBI agent, an MBA degree, an SEC filing. Writers on usage formerly...