Маркетинг и реклама: создание уникальных визуальных материалов для рекламных кампаний . Nonessential Words, clauses, and phrases that occur midsentence must be enclosed by commas. The closing comma is called an appositive comma. Many writers forget to add this important comma. Following are two instances of the need for an appositive https://intensedebate.com/people/routeway11