APA (7th ed.) Zitazioa

STEEL, T. (1966). Formal language description languages. North-Holland.

Chicago Style (17th ed.) Zitazioa

STEEL, T.B. Formal Language Description Languages. Amsterdam: North-Holland, 1966.

MLA (9th ed.) Zitazioa

STEEL, T.B. Formal Language Description Languages. North-Holland, 1966.