Não informado. (1987). Agricultural Administration and Extension. Elsevier Applied Science.
Style de citation Chicago (17e éd.)Não informado. Agricultural Administration and Extension. Essex, Inglaterra: Elsevier Applied Science, 1987.
Style de citation MLA (8e éd.)Não informado. Agricultural Administration and Extension. Elsevier Applied Science, 1987.
Attention : ces citations peuvent ne pas être correctes à 100%.