Não informado. (2004). Expedition to South-West Arabia, 1937-1938. Trustees of the British Museum.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Expedition to South-West Arabia, 1937-1938. London: Trustees of the British Museum, 2004.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Expedition to South-West Arabia, 1937-1938. Trustees of the British Museum, 2004.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.