Answered By: Mary Kaye Hooker Last Updated: Jun 28, 2018 Views: 10
Source: http://blog.apastyle.org/apastyle/2009/10/how-to-cite-twitter-and-facebook-part-ii.html#comment-6a01157041f4e3970b0162fbfa8f95970d Page down to entry dated October 28, 2011.
"No, it's not necessary to include the trademark symbol for a trademarked term in academic writing. The trademark symbol is generally necessary to include only in commercial writing, meaning writing that pertains to commerce or the buying and selling of goods (e.g., advertisements). The word Twitter (and other names of companies) can be written in regular, nonitalic font as well. "