Ruthven , M. (1991). Islam in the World (ed.). Penhguins books.
Cita Chicago (17th ed.)Ruthven , Malise. Islam in the World. ed. Penhguins books, 1991.
Cita MLA (9th ed.)Ruthven , Malise. Islam in the World. ed. Penhguins books, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.