The following list offer examples of citations according to the Chicago Manual of Style, 16th edition, 2010.
Trade journal article:
Mark Schapiro, “New Power for ‘Old Europe,’” The Nation, December 27, 2004.
Trade journal article, with a DOI:
John H. Reif, "Scaling Up DNA Computation," Science 332 no. 6034 , June 3, 2011, 1156-1157 , doi: 10.1126/science.1208068.
Trade journal article, with a Web address and no author:
"Beyond the Box: Television Rushes Online, Only to Wonder Where the Money is," Economist, 395 no. 8680, April 29, 2010,
http://www.economist.com/node/15980839.
Magazine article:
Schapiro, Mark. “New Power for ‘Old Europe.’” The Nation. December 27, 2004.
Magazine article, with a DOI:
Reif, John H. "Scaling Up DNA Computation." Science 332 no. 6034: 1156-1157. June 3, 2011 . doi:10.1126/science.1208068.
Magazine article, with a Web address and no author:
"Beyond the Box: Television Rushes Online, Only to Wonder Where the Money is." Economist, 395 no. 8680: 5-7. April 29, 2010,
http://www.economist.com/node/15980839.