Hawthorn, G. (1970). The sociology of fertility. Collier-Macmillan.
Lua i Stíl Chicago (17ú heag.)Hawthorn, Geoffrey. The Sociology of Fertility. London: Collier-Macmillan, 1970.
Lua MLA (9ú heag.)Hawthorn, Geoffrey. The Sociology of Fertility. Collier-Macmillan, 1970.
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