Each is an alphabetical list of works cited, or works to which you have made reference. Works Cited is generally used when citing sources using MLA (Modern Language Association) style, while the title References is used when citing sources using APA (American Psychological Association) style.Works Cited and Bibliography are not the same. In Works Cited you only list items you have actually cited.In a Bibliography you list all of the material you have consulted in preparing your essay whether or not you have actually cited the work.ach is an alphabetical list of works cited, or works to which you have made reference. Works Cited is generally used when citing sources using MLA (Modern Language Association) style, while the title References is used when citing sources using APA (American Psychological Association) style.
Each area code has 7,920,000 different usable phone numbers. (Although there are technically 10 million seven-digit phone number combinations available in each area code, some numbers aren't available, such as 911, 411, and numbers starting with 0 or 1.)
Your question is based on faulty information. First of all, there are far fewer than 517 area codes currently in use in the United States, even if you include the other countries that use US-style area codes (Canada and 16 island countries in or near the Caribbean, plus US territories in the Caribbean and Pacific).