Cho, L., Bogue, D. J., & Grabill, W. H. (1970). Differential current fertility in the United States. Community Family Study Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCho, Lee-Jay, Donald J. Bogue, और Wilson H. Grabill. Differential Current Fertility in the United States. Chicago: Community Family Study Center, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCho, Lee-Jay, et al. Differential Current Fertility in the United States. Community Family Study Center, 1970.
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