Gaya APA

Swanson, C, P., Walpole, B. (NULL). Encyclopedia of science 6 body and health . New: New York: Macmillan Pub.Co.; 1991.

Gaya MLA

Swanson, Carl, P.., Walpole, Brenda. "Encyclopedia of science 6 body and health". New: New York: Macmillan Pub.Co.; 1991, NULL. Text.