APA
Morpurgo M., . (1996). The Butterfly Lion. London: HarperCollins Children's Books.
Chicago
Morpurgo Michael, . 1996. The Butterfly Lion. London: HarperCollins Children's Books.
Harvard
Morpurgo M., . (1996). The Butterfly Lion. London: HarperCollins Children's Books.
MLA
Morpurgo Michael, . The Butterfly Lion. London: HarperCollins Children's Books. 1996.