Blechschmidt, E. (1961). The stages of human development before birth: An introduction to human embryology. W. B. Saunders.
Lua i Stíl Chicago (17ú heag.)Blechschmidt, Erich. The Stages of Human Development Before Birth: An Introduction to Human Embryology. Philadelphia: W. B. Saunders, 1961.
Lua MLA (9ú heag.)Blechschmidt, Erich. The Stages of Human Development Before Birth: An Introduction to Human Embryology. W. B. Saunders, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.