Example:
All 33 Chile miners freed in flawless rescue. (2010, October 13). Retrieved from http://www.msnbc.msn.com/id/39625809/ns/world_news-americas/
IN TEXT
One author:
Two authors:
Three to five authors (cite all authors the first time the reference occurs; in subsequent citation(s), include the surname of the first author followed by et al.):
Six or more authors (include the surname of the first author followed by et al.):
If both authors have the same surname, include the first author's initials in all text citations, even if the year of publication differs (p. 176, section 6.14):
If both authors have the same surname and first initial, provide the authors' full name:
One author:
Two authors (cite both author names in every reference):
Three to five authors (cite all authors the first time the reference occurs; in subsequent citation(s), include the surname of the first author followed by et al.):
Six or more authors (include the surname of the first author followed by et al.):
When multiple studies support an argument, include multiple citations inside the same set of parentheses. Within the parentheses, alphabetize the studies as they appear in the reference list and separate with semicolons. In running text, address studies in whatever order is wished.