Markaz al-Qawmi lil-I`lam wa-al-Tawthiq. (1970). United Arab Republic journal of soil science. National Information and Documentation Centre.
Chicago-referens (17:e uppl.)Markaz al-Qawmi lil-I`lam wa-al-Tawthiq. United Arab Republic Journal of Soil Science. Cairo, U.A.R.: National Information and Documentation Centre, 1970.
MLA-referens (8:e uppl.)Markaz al-Qawmi lil-I`lam wa-al-Tawthiq. United Arab Republic Journal of Soil Science. National Information and Documentation Centre, 1970.
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