American Psychological Association
Sparks, Karen Jacobs, & Shepherd, Melinda C, & Bolzon, Henry (Eds.). ( 2008 ). Encyclopedia Britannica 2008 ( 00 ed. ). Encyclopaedia Britannica Inc.
Modern Language Association
Sparks, Karen Jacobs and Shepherd, Melinda C and Bolzon, Henry. Encyclopedia Britannica 2008 . Encyclopaedia Britannica Inc. 2008
Chicago Citation
Sparks, Karen Jacobs and Shepherd, Melinda C and Bolzon, Henry. Encyclopedia Britannica 2008 . 00 .New Delhi
: Encyclopaedia Britannica Inc, 2008.
American Medical Association
Sparks, Karen Jacobs and Shepherd, Melinda C and Bolzon, Henry. Encyclopedia Britannica 2008 . Encyclopaedia Britannica Inc; 2008.
