Keyfitz, N., & Smith, D. P. (1977). Mathematical demography: Selected papers. Springer-Verlag.
芝加哥风格引文Keyfitz, Nathan, 与 David P. Smith. Mathematical Demography: Selected Papers. Berlin: Springer-Verlag, 1977.
MLA引文Keyfitz, Nathan, 与 David P. Smith. Mathematical Demography: Selected Papers. Springer-Verlag, 1977.
警告：这些引文格式不一定是100％准确.