Pressensé, E. d., & Holmden, A. H. (1893). A study of origins, or, The problems of knowledge, of being and of duty. James Pott & Co..
Lua i Stíl Chicago (17ú heag.)Pressensé, Edmond de, agus Annie Harwood Holmden. A Study of Origins, or, The Problems of Knowledge, of Being and of Duty. New York: James Pott & Co., 1893.
Lua MLA (8ú heag.)Pressensé, Edmond de, agus Annie Harwood Holmden. A Study of Origins, or, The Problems of Knowledge, of Being and of Duty. James Pott & Co., 1893.
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