APA (7th ed.) Citation

Partridge, G. E. (2007). The Psychology of Nations A Contribution to the Philosophy of History. Project Gutenberg.

Chicago Style (17th ed.) Citation

Partridge, G. E. The Psychology of Nations A Contribution to the Philosophy of History. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Partridge, G. E. The Psychology of Nations A Contribution to the Philosophy of History. Project Gutenberg, 2007.

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