Cita APA (7a ed.)

Barbini, J. (1985). States and regions. Harcourt Brace Jovanovich.

Cita Chicago Style (17a ed.)

Barbini, John. States and Regions. Orlando [u.a.]: Harcourt Brace Jovanovich, 1985.

Cita MLA (9a ed.)

Barbini, John. States and Regions. Harcourt Brace Jovanovich, 1985.