Não informado. (1949). General embryological information service. International Embryological Institute, Hubrecht Laboratory.
Chicago-viite (17. p.)Não informado. General Embryological Information Service. Utrecht, Holanda: International Embryological Institute, Hubrecht Laboratory, 1949.
MLA-viite (8. p.)Não informado. General Embryological Information Service. International Embryological Institute, Hubrecht Laboratory, 1949.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.