Citazione Stile APA (7a Edizione)

Heiddorn, k., & Whitelaw, I. (2010). The field guide to natural wonders. A. & C. Black.

Citazione stile Chigago Style (17a edizione)

Heiddorn, keith, e Ian Whitelaw. The Field Guide to Natural Wonders. London: A. & C. Black, 2010.

Citatione MLA (9a ed.)

Heiddorn, keith, e Ian Whitelaw. The Field Guide to Natural Wonders. A. & C. Black, 2010.