"An holistic" is the wrong way to say it. You have to say "a holistic" because you only use "an" before a vowel (a, e, u, e, o). You use "a" before anything that is not a vowel.Not exactly true. What...
There is a difference of opinion on this. Some use "an" in front of certain words that begin with a non-silent "h", but others think it that there is no reason these words should be treated...