APA (7th ed.) Citation

Santiago, W. (2011). "21": The story of Roberto Clemente : a graphic novel. Fantagraphics Books.

Chicago Style (17th ed.) Citation

Santiago, Wilfred. "21": The Story of Roberto Clemente : A Graphic Novel. Seattle: Fantagraphics Books, 2011.

MLA (9th ed.) Citation

Santiago, Wilfred. "21": The Story of Roberto Clemente : A Graphic Novel. Fantagraphics Books, 2011.

Warning: These citations may not always be 100% accurate.