(1998). The journal of agricultural education and extension. Group Communication and Innovation Studies.
Chicago-referens (17:e uppl.)The Journal of Agricultural Education and Extension. Wageningen, The Netherlands: Group Communication and Innovation Studies, 1998.
MLA-referens (9:e uppl.)The Journal of Agricultural Education and Extension. Group Communication and Innovation Studies, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.