Davies, R. (1986). What's bred in the bone. Penguin Books.
Cita Chicago Style (17a ed.)Davies, Robertson. What's Bred in the Bone. Ontario: Penguin Books, 1986.
Cita MLA (9a ed.)Davies, Robertson. What's Bred in the Bone. Penguin Books, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.