Cho, K. S. (1972). A survey of family planning workers. Korean Institute for Family Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCho, Kyoung Sik. A Survey of Family Planning Workers. [Seoul]: Korean Institute for Family Planning, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCho, Kyoung Sik. A Survey of Family Planning Workers. Korean Institute for Family Planning, 1972.
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