Harper, J. R. (1988). Initial survey of the Betio/Bairiki causeway, Tarawa, Republic of Kiribati, September 1987. International Centre for Ocean Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarper, John R. Initial Survey of the Betio/Bairiki Causeway, Tarawa, Republic of Kiribati, September 1987. [Canada: International Centre for Ocean Development, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHarper, John R. Initial Survey of the Betio/Bairiki Causeway, Tarawa, Republic of Kiribati, September 1987. International Centre for Ocean Development, 1988.
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