Não informado. Publications on Geodesy. Netherlands Geodetic Commission.
Chicago-viite (17. p.)Não informado. Publications on Geodesy. Delft, Holanda: Netherlands Geodetic Commission.
MLA-viite (8. p.)Não informado. Publications on Geodesy. Netherlands Geodetic Commission.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.