Donaldson, G. F. (1968). Farm machinery safety: Physical welfare effects of the man-machine interaction on farms. Royal Commission on Farm Machinery.
Chicago-referens (17:e uppl.)Donaldson, Graham Francis. Farm Machinery Safety: Physical Welfare Effects of the Man-machine Interaction on Farms. [Ottawa]: Royal Commission on Farm Machinery, 1968.
MLA-referens (8:e uppl.)Donaldson, Graham Francis. Farm Machinery Safety: Physical Welfare Effects of the Man-machine Interaction on Farms. Royal Commission on Farm Machinery, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.