Gaya APA

Marrin, A. (2002). Dr. Jenner and the speckled monster : the search for smallpox vaccine . New York: Duffon Children\'s Book.

Gaya MLA

Marrin, Albert. "Dr. Jenner and the speckled monster : the search for smallpox vaccine". New York: Duffon Children\'s Book, 2002. Text.