Göttner, R. (1973). Was soll - was kann Prognostik? Urania.
Citação do estilo Chicago (17ª ed.)Göttner, Reinhard. Was Soll - Was Kann Prognostik? Leipzig: Urania, 1973.
Citação MLA (8ª ed.)Göttner, Reinhard. Was Soll - Was Kann Prognostik? Urania, 1973.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.