Smith, D. W., & Bierman, E. L. (1973). The biologic ages of man: From conception through old age. W.B. Saunders.
Lua i Stíl Chicago (17ú heag.)Smith, David W., agus Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. Philadelphia: W.B. Saunders, 1973.
Lua MLA (9ú heag.)Smith, David W., agus Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. W.B. Saunders, 1973.
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