APA (7th ed.) Zitazioa

Popkorn, S. (1994). First steps in model logic. Cambridge Univ. Pr.

Chicago Style (17th ed.) Zitazioa

Popkorn, Sally. First Steps in Model Logic. Cambridge: Cambridge Univ. Pr, 1994.

MLA (9th ed.) Zitazioa

Popkorn, Sally. First Steps in Model Logic. Cambridge Univ. Pr, 1994.