APA

Ibrahim, . (1978). The problem of desertification in the Republic of the Sudan, with special reference to Northern Darfur Province. [Khartoum]: Development Studies and Research Centre, Faculty of Economic & Social Studies, University of Khartoum.

Chicago

Ibrahim, . 1978. The problem of desertification in the Republic of the Sudan, with special reference to Northern Darfur Province. [Khartoum]: Development Studies and Research Centre, Faculty of Economic & Social Studies, University of Khartoum.

Harvard

Ibrahim, . (1978). The problem of desertification in the Republic of the Sudan, with special reference to Northern Darfur Province. [Khartoum]: Development Studies and Research Centre, Faculty of Economic & Social Studies, University of Khartoum.

MLA

Ibrahim, . The problem of desertification in the Republic of the Sudan, with special reference to Northern Darfur Province. [Khartoum]: Development Studies and Research Centre, Faculty of Economic & Social Studies, University of Khartoum. 1978.