Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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