Smith, D., & Keyfitz, N. (1977). Mathematical demography: Selected papers. Springer.
Lua i Stíl Chicago (17ú heag.)Smith, David, agus Nathan Keyfitz. Mathematical Demography: Selected Papers. Berlin [u.a.]: Springer, 1977.
Lua MLA (8ú heag.)Smith, David, agus Nathan Keyfitz. Mathematical Demography: Selected Papers. Springer, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.