Williams, P. J. (1992). Women, trees, and forests in Africa: A resource guide. Environment Liaison Centre International.
Chicago-referens (17:e uppl.)Williams, Paula J. Women, Trees, and Forests in Africa: A Resource Guide. Nairobi, Kenya: Environment Liaison Centre International, 1992.
MLA-referens (9:e uppl.)Williams, Paula J. Women, Trees, and Forests in Africa: A Resource Guide. Environment Liaison Centre International, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.