Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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