Reference, as in Will you be a reference for me, is quite commonly understood to mean the person providing the reference, in spite of some dictionaries not indicating such meaning. I don't know of any data to confirm or confute your claim that "reference to most people means the action or the text of the recommendation, not the person". I agree there can be confusion, even though "be a reference" implies acting as a reference contact.
In looking at synonyms of reference and referee, I see many words that will serve in specific cases, but no English words that have the specific meaning sought. (In Dutch, referentie means "a reference, person who vouches for another, character witness".) Synonyms of related words include: advocate, angel, backer, benefactor, bonder, champion, defender, follower, friend, guarantor, helper, partisan, patron, protector, referee, second, sponsor, supporter, warrantor, well-wisher. Neological terms include: voucher, referrer, recommender.
(Edit: removed duplicate words from list)
Technically, "from" is the better option of the two. For the purposes of this forum, I should stop there, but "A, B, C, D, and E Quotes" is not effective usage for a title, and a string of five nouns standing in for adjectives is simply ponderous. If you want a subtitle, "Quotes from A, B, C, D, and E" works fine, but the title--the thing you want people to recognize, recall, and repeat--needs two things: brevity and pizazz. (Yes, everything from "but the title" onward belongs on a marketing forum instead.)
Best Answer
No, don't use use mongoloid to refer to Down's syndrome in any form of English, it's offensive.
The Downs Syndrome Association advise the media of What To Say / Not Say, including:
Down's Syndrome Scotland recently issued a statement, this is much more relevant to informal English, and I'll quote it in full:
Read more about disablist language from Richard Herring.