Não informado. (2009). Proceedings of the Birmingham Natural History and Philosophical Society. Birmingham Natural History and Philosophical Society.
Citação do estilo Chicago (17ª ed.)Não informado. Proceedings of the Birmingham Natural History and Philosophical Society. Birmingham, Inglaterra: Birmingham Natural History and Philosophical Society, 2009.
Citação MLA (8ª ed.)Não informado. Proceedings of the Birmingham Natural History and Philosophical Society. Birmingham Natural History and Philosophical Society, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.