Guyer
Guyer, Paul and Rolf-Peter Horstmann, "Idealism", The Stanford Encyclopedia of Philosophy (Fall 2022 Edition), Edward N. Zalta (ed.), URL = <https://plato.stanford.edu/archives/fall2022/entries/idealism/>.
Guyer, Paul and Rolf-Peter Horstmann, "Idealism", The Stanford Encyclopedia of Philosophy (Fall 2022 Edition), Edward N. Zalta (ed.), URL = <https://plato.stanford.edu/archives/fall2022/entries/idealism/>.