Before citing an article from a periodical, one needs to determine if the article is from a magazine or a scholarly journal. There are two general clues to look to in order to make this determination:
1. Frequency of publication. Journals are more likely to be monthly, bi-monthly, or quarterly publications. If the periodical is published weekly, then it is a magazine and not a journal.
2. Pagination. Magazines are generally paginated by issue, i.e. with each new issue the page numbers start over with number one. Scholarly journals are paginated consecutively throughout the volume year. Page number does not begin with number one again until the first issue of the next volume year.

*Examine your article and determine if it is a magazine article or not. Follow these links for a scholarly journal article, a book review, or a newspaper article as these are all cited differently.

Example
Barone, Michael. "The Experience Factor." U.S. News & World Report 25 Dec. 2006: 26.

Author
Last name, then first and middle. Avoid initials, if possible. Does your article have multiple authors? End with a period. - Barone, Michael.

Title & subtitle of the article
The title & subtitle are separated by a colon. Capitalize the first and last words of the title and subtitle, and all proper nouns and important words. Place article title & subtitle in quotations and end with a period - "The Experience Factor."

Title & subtitle of magazine
The title & subtitle are separated by a colon. Capitalize the first and last words of the title and subtitle, and all proper nouns and important words. Underline magazine title & subtitle and DO NOT end with a period - U.S. News & World Report

Date of publication
If weekly, day of month followed by abbreviation of month. Click here for the proper abbreviations to use. Year is followed by a colon to separate it from the page numbers - 25 Dec. 2006:

Page numbers
If page numbers of article run consecutively, separate beginning and ending page numbers with a hyphen. End the citation with a period. If the pages do not run consecutively, then indicate beginning page of the article followed by a + sign - 26.