SpringerLink (Online service), Kalwij, A., & Gustafsson, S. Education and postponement of maternity: Economic analyses for industrialized countries.
芝加哥风格引文SpringerLink (Online service), Adriaan Kalwij, 与 Siv Gustafsson. Education and Postponement of Maternity: Economic Analyses for Industrialized Countries.
MLA引文SpringerLink (Online service), et al. Education and Postponement of Maternity: Economic Analyses for Industrialized Countries.
警告：这些引文格式不一定是100％准确.