Nieuwkoop, P. D. (1967). Normal table of xenopus laevis (Daudin): A systematical and chronological survey of the development from the fertilized egg till the end of metamorphoses (2. ed.). North-Holland Publ.
Chicago-Zitierstil (17. Ausg.)Nieuwkoop, Pieter D. Normal Table of Xenopus Laevis (Daudin): A Systematical and Chronological Survey of the Development from the Fertilized Egg Till the End of Metamorphoses. 2. ed. Amsterdam: North-Holland Publ, 1967.
MLA-Zitierstil (9. Ausg.)Nieuwkoop, Pieter D. Normal Table of Xenopus Laevis (Daudin): A Systematical and Chronological Survey of the Development from the Fertilized Egg Till the End of Metamorphoses. 2. ed. North-Holland Publ, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.