APA (7th ed.) Citation

Thoreau, H. D. On the Duty of Civil Disobedience.

Chicago Style (17th ed.) Citation

Thoreau, Henry David. On the Duty of Civil Disobedience.

MLA (9th ed.) Citation

Thoreau, Henry David. On the Duty of Civil Disobedience.

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