Não informado. (1971). IDS Communication. University of Sussex, Institute of Development Studies.
Chicago-Zitierstil (17. Ausg.)Não informado. IDS Communication. Brighton, Inglaterra: University of Sussex, Institute of Development Studies, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. IDS Communication. University of Sussex, Institute of Development Studies, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.