Eckstein, Z., & Zimmermann, K. F. (1989). Economic theory of optimal population. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Eckstein, Zvi, agus Klaus F. Zimmermann. Economic Theory of Optimal Population. Berlin: Springer-Verlag, 1989.
Lua MLA (9ú heag.)Eckstein, Zvi, agus Klaus F. Zimmermann. Economic Theory of Optimal Population. Springer-Verlag, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.