APA (7th ed.) Citation

Hardy, G. H. (2012). A Course of Pure Mathematics Third Edition. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hardy, G. H. A Course of Pure Mathematics Third Edition. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Hardy, G. H. A Course of Pure Mathematics Third Edition. Project Gutenberg, 2012.

Warning: These citations may not always be 100% accurate.