APA (7th ed.) Citation

Ingham, B., Fayadh, J., & Sanderson, I. (2005). Customs & etiquette of Arabia & Gulf states. Simple Guides.

Chicago Style (17th ed.) Citation

Ingham, Bruce, J. Fayadh, and Irene Sanderson. Customs & Etiquette of Arabia & Gulf States. London: Simple Guides, 2005.

MLA (9th ed.) Citation

Ingham, Bruce, et al. Customs & Etiquette of Arabia & Gulf States. Simple Guides, 2005.