APA (7th ed.) Citation

Gibb, H. A. R., Pearson, H., & Pearson, J. D. (1997). The Encyclopaedia of Islam: Prepared by a number of leading orientalists. E.J. Brill.

Chicago Style (17th ed.) Citation

Gibb, H. A. R., H. Pearson, and J. D. Pearson. The Encyclopaedia of Islam: Prepared by a Number of Leading Orientalists. Leiden: E.J. Brill, 1997.

MLA (8th ed.) Citation

Gibb, H. A. R., et al. The Encyclopaedia of Islam: Prepared by a Number of Leading Orientalists. E.J. Brill, 1997.