APA aipamena

Keller, N., & Swaney, D. (1998). Tonga (3rd ed.). Lonely Planet Pub.

Chicago Style aipamena

Keller, Nancy, and Deanna Swaney. Tonga. 3rd ed. Hawthorn, Vic., Australia: Lonely Planet Pub, 1998.

MLA aipamena

Keller, Nancy, and Deanna Swaney. Tonga. 3rd ed. Lonely Planet Pub, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.