APA (7th ed.) Zitazioa

Hubbard. (2019). Essentials Of Economics (6th ed.). Pearson.

Chicago Style (17th ed.) Zitazioa

Hubbard. Essentials Of Economics. 6th ed. Newyork: Pearson, 2019.

MLA (9th ed.) Zitazioa

Hubbard. Essentials Of Economics. 6th ed. Pearson, 2019.