Services, Diplomatic Language (2016. szeptember 8.). "How do people sing in a tonal language?". Diplomatic Language Services (amerikai angol nyelven). Hozzáférés: 2020. december 30.
According to the strict sense of homonyms as words with the same spelling and pronunciation; however, homonyms according to the loose sense common in nontechnical contexts are words with the same spelling or pronunciation, in which case all homophones are also homonyms. Random House Unabridged Dictionary entry for "homonym" at Dictionary.com