a) Gregor Muchen notes in A Protected Earth that "greenways as well as protected areas will help in improving the earth, especially the air quality" (279).
When citing a source, it is necessary to include the author's last name and page number. If there is more than one source by the same author in the Works Cited, it is important to also include the title of the source. In this case, the author's name and title of the source are included in the information that sets up the quote. Because this information is already included, it does not need to be repeated in the parenthetical citation after the quote. Since the page number is not included in the setup of the quotation, it must be included after the quote, but before the period.
