Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993. regarding, as regards, in regard(s) to, with regard(s) to
Idioms: in regard to
Also, as regards; in or with reference to; with regard to; in or with respect to. Concerning, about. For example, In regard to your letter, forget it, or As regards your subscription, I'm not sure why it was canceled, or In reference to your inquiry, we'll have to pass it on to the board, or We have a few questions with regard to your recent offer, or With respect to your latest request, we'll be happy to oblige. The word reference has been used in this idiom since the late 1500s, regard from the second half of the 1400s, and respect from the first half of the 1500s. Also see relative to.