APA (7th ed.) Zitazioa

R.R. Bowker Company. (1987). Books in print. .R.R. Bowker Co.

Chicago Style (17th ed.) Zitazioa

R.R. Bowker Company. Books in Print. New Jersey: .R.R. Bowker Co, 1987.

MLA (9th ed.) Zitazioa

R.R. Bowker Company. Books in Print. .R.R. Bowker Co, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.