Não informado. (1950). Bulletin of the British Museum Natural History. British Museum of Natural History.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the British Museum Natural History. London: British Museum of Natural History, 1950.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the British Museum Natural History. British Museum of Natural History, 1950.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.