Cita APA (7a ed.)

Barrett, K., & Stannard, D. (1990). Insight guides: Italy. APA Pub.

Cita Chicago Style (17a ed.)

Barrett, Katherine, y Dorothy Stannard. Insight Guides: Italy. Singapore: APA Pub, 1990.

Cita MLA (9a ed.)

Barrett, Katherine, y Dorothy Stannard. Insight Guides: Italy. APA Pub, 1990.