Cita APA

Riordan,Rick. (2009). Percy jackson: The demigod files. Puffin Books.

Citación estilo Chicago

Riordan,Rick. Percy Jackson: The Demigod Files. London: Puffin Books, 2009.

Cita MLA

Riordan,Rick. Percy Jackson: The Demigod Files. Puffin Books, 2009.