Não informado. (1971). IDS Communication. University of Sussex, Institute of Development Studies.
Style de citation Chicago (17e éd.)Não informado. IDS Communication. Brighton, Inglaterra: University of Sussex, Institute of Development Studies, 1971.
Style de citation MLA (8e éd.)Não informado. IDS Communication. University of Sussex, Institute of Development Studies, 1971.
Attention : ces citations peuvent ne pas être correctes à 100%.