APA

The international conferences on the geology of the tethys, Youssef E. S. A. & Tethys Geological Society (Egypt). (2007). Proceedings of the first international conferences on the geology of the tethys, Cairo University, November 2005. Giza, Egypt: Cairo University Press.

Chicago

The international conferences on the geology of the tethys, Youssef El Sayed A and Tethys Geological Society (Egypt). 2007. Proceedings of the first international conferences on the geology of the tethys, Cairo University, November 2005. Giza, Egypt: Cairo University Press.

Harvard

The international conferences on the geology of the tethys, Youssef E. S. A. and Tethys Geological Society (Egypt). (2007). Proceedings of the first international conferences on the geology of the tethys, Cairo University, November 2005. Giza, Egypt: Cairo University Press.

MLA

The international conferences on the geology of the tethys, Youssef El Sayed A and Tethys Geological Society (Egypt). Proceedings of the first international conferences on the geology of the tethys, Cairo University, November 2005. Giza, Egypt: Cairo University Press. 2007.