Winterbottom, J. M. (1965). A preliminary list of the birds of Hopetown District. Percy FitzPatrick Institute of African Ornithology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWinterbottom, J. M. A Preliminary List of the Birds of Hopetown District. [Rondebosch, C.P. South Africa]: Percy FitzPatrick Institute of African Ornithology, 1965.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWinterbottom, J. M. A Preliminary List of the Birds of Hopetown District. Percy FitzPatrick Institute of African Ornithology, 1965.
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