Smith, D. W., & Bierman, E. L. (1973). The biologic ages of man: From conception through old age. W.B. Saunders.
Cita Chicago (17th ed.)Smith, David W., i Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. Philadelphia: W.B. Saunders, 1973.
Cita MLA (9th ed.)Smith, David W., i Edwin L. Bierman. The Biologic Ages of Man: From Conception Through Old Age. W.B. Saunders, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.