APA (7th ed.) Zitazioa
Black, H. Doctor Who: 12 Doctors 12 Stories. Puffin Books.
Chicago Style (17th ed.) Zitazioa
Black, Holly. Doctor Who: 12 Doctors 12 Stories. Nueva York, EUA: Puffin Books.
MLA (9th ed.) Zitazioa
Black, Holly. Doctor Who: 12 Doctors 12 Stories. Puffin Books.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.