I wanted to write a formal thank you letter to a newspaper; however, I am unsure of the underline/quotation/italicize rule when referring to the newspaper as a business.
For example, the sentence below refers to the newspaper as a business and not a periodical:
Dear Ms. Doe:
I wanted to let you know how much I enjoyed my recent visit to *** and the opportunity to interview for the position....
Should *** be: The Sun News, The Sun News, "The Sun News" or simply The Sun News?