APA (7th ed.) Citation

Hardy, E. J. (2011). How to be Happy Though Married Being a Handbook to Marriage. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hardy, Edward John. How to Be Happy Though Married Being a Handbook to Marriage. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Hardy, Edward John. How to Be Happy Though Married Being a Handbook to Marriage. Project Gutenberg, 2011.

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