Јужни Јемен — разлика између измена

* {{Cite book |ref= harv|last = Ismael| first = Tareq Y.| authorlink = Tareq Y. Ismael | coauthors = Jacqueline S. Ismael | title = The People's Democratic Republic of Yemen: Politics, Economics, and Society; The Politics of Socialist Transformation | publisher = Lynne Rienner Pub | date year= 1986 | month= October | location = | url = | doi = |id=ISBN 0-931477-96-4}}