Gaya APA

, ., Sis, P. (2003). The tree of linf: a book depicting the life of Charles Darwin: naturalist, geologist & thinker . New York: New York: Frances Foster Books, 2003.

Gaya MLA

, ., Sis, Peter. "The tree of linf: a book depicting the life of Charles Darwin: naturalist, geologist & thinker". New York: New York: Frances Foster Books, 2003, 2003. .