Quotation marks should not enclose titles at the beginning of papers or articles, chapter headings, epigraphs, well-known literary expressions, the words yes or no (except in direct speech), proverbs or well-known sayings, matter following so-called, or mathematical or scientific symbols.
© Public Works and Government Services Canada, 2017
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
Writing tools – The Canadian Style
A product of the Translation Bureau