Cranstone, B. (1987). Why are pigs (and some other animals) not milked? Anthropological Society of Oxford.
Cita Chicago Style (17a ed.)Cranstone, BAL. Why Are Pigs (and Some Other Animals) Not Milked? Anthropological Society of Oxford, 1987.
Cita MLA (9a ed.)Cranstone, BAL. Why Are Pigs (and Some Other Animals) Not Milked? Anthropological Society of Oxford, 1987.
Precaución: Estas citas no son 100% exactas.