Não informado. (2018). Publications of the Astronomical Institute of the University of Amsterdam. University of Amsterdam, Astronomical Institute.
Citação do estilo Chicago (17ª ed.)Não informado. Publications of the Astronomical Institute of the University of Amsterdam. Amsterdam: University of Amsterdam, Astronomical Institute, 2018.
Citação MLA (8ª ed.)Não informado. Publications of the Astronomical Institute of the University of Amsterdam. University of Amsterdam, Astronomical Institute, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.