Frejka, T. (1980). Fertility trends and policies: Czechoslovakia in the 1970's. The Population Countries.
芝加哥风格引文Frejka, Tomas. Fertility Trends and Policies: Czechoslovakia in the 1970's. New York: The Population Countries, 1980.
MLA引文Frejka, Tomas. Fertility Trends and Policies: Czechoslovakia in the 1970's. The Population Countries, 1980.
警告：这些引文格式不一定是100％准确.