Animales Sanos. United States Department of Agriculture, Agricultural Research Service.
Citazione stile Chigago Style (17a edizione)Animales Sanos. United States Department of Agriculture, Agricultural Research Service.
Citatione MLA (9a ed.)Animales Sanos. United States Department of Agriculture, Agricultural Research Service.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.