APA (7th ed.) Zitazioa
ebrary, Inc. (2010). Directory of publishing 2011: United Kingdom and the Republic of Ireland (36th ed.). Continuum.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc. Directory of Publishing 2011: United Kingdom and the Republic of Ireland. 36th ed. London: Continuum, 2010.
MLA (9th ed.) Zitazioa
ebrary, Inc. Directory of Publishing 2011: United Kingdom and the Republic of Ireland. 36th ed. Continuum, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.