Adams, M. E. (1982). Agricultural extension in developing countries. Longman.
Lua i Stíl Chicago (17ú heag.)Adams, M. E. Agricultural Extension in Developing Countries. Burnt Mill, Harlow, Essex: Longman, 1982.
Lua MLA (8ú heag.)Adams, M. E. Agricultural Extension in Developing Countries. Longman, 1982.
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