- https://en.wikisource.org/wiki/International_Journal_of_Ethics
- https://en.wikisource.org/wiki/Portal:Ethics
- https://en.wikisource.org/wiki/Ethics_(Moore)
- Ethics and the Struggle for Existence. J. C. Flügel. Int. J. E., XXV, 4, pp. 518-539.
- " Ethics and Casuistry " in the International Journal of Ethics, July 1914.
