Παραπομπή APA

Ash, R. (2007). Whitaker's World of facts. Penguin Books India.

Παραπομπή Chicago Style

Ash, Russell. Whitaker's World of Facts. New Delhi: Penguin Books India, 2007.

Παραπομπή MLA

Ash, Russell. Whitaker's World of Facts. Penguin Books India, 2007.