Não informado. (2004). Expedition to South-West Arabia, 1937-1938. Trustees of the British Museum.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Expedition to South-West Arabia, 1937-1938. London: Trustees of the British Museum, 2004.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Expedition to South-West Arabia, 1937-1938. Trustees of the British Museum, 2004.
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