Sparks, N. (2011). The guardian. Sphere.
Chicago Style aipamenaSparks, Nicholas. The Guardian. London: Sphere, 2011.
MLA aipamenaSparks, Nicholas. The Guardian. Sphere, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Sparks, N. (2011). The guardian. Sphere.
Chicago Style aipamenaSparks, Nicholas. The Guardian. London: Sphere, 2011.
MLA aipamenaSparks, Nicholas. The Guardian. Sphere, 2011.