APA (7th ed.) Citation

Welch, A. T., Cachia, P., & Watt, W. M. (1979). Islam, past influence and present challenge. Edinburgh University Press.

Chicago Style (17th ed.) Citation

Welch, Alford T., Pierre Cachia, and W. Montgomery Watt. Islam, Past Influence and Present Challenge. Edinburgh: Edinburgh University Press, 1979.

MLA (9th ed.) Citation

Welch, Alford T., et al. Islam, Past Influence and Present Challenge. Edinburgh University Press, 1979.