For+an+on-line+encyclopedia

   **Article from an Online ** ** Encyclopedia: **  Mieczkowski, Yanek. "Obama, Barack." __World Book Student__. 2009. [Place of access.] 29 April 2009 . Example: " Keller, Helen ." __Britannica Elementary Encyclopedia__. 2009. Encyclopædia Britannica Online School Edition. 29 Apr. 2009 < [] >.