APA (7th ed.) Citation

Gillman, H., Bardwell, S., Cavedoni, S., & Tapp, N. (1998). Walking in Italy. Lonely Planet Publications.

Chicago Style (17th ed.) Citation

Gillman, Helen, Sandra Bardwell, Stefano Cavedoni, and Nick Tapp. Walking in Italy. London: Lonely Planet Publications, 1998.

MLA (8th ed.) Citation

Gillman, Helen, et al. Walking in Italy. Lonely Planet Publications, 1998.