APA (7th ed.) Citation

Petty, W., & Morley, H. (2004). Essays on Mankind and Political Arithmetic. Project Gutenberg.

Chicago Style (17th ed.) Citation

Petty, William, and Henry Morley. Essays on Mankind and Political Arithmetic. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Petty, William, and Henry Morley. Essays on Mankind and Political Arithmetic. Project Gutenberg, 2004.

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