APA (7th ed.) Citation

Duffy, J. (1967). A question of slavery. Harvard Univ. Pr.

Chicago Style (17th ed.) Citation

Duffy, James. A Question of Slavery. Cambridge, Mass: Harvard Univ. Pr, 1967.

MLA (9th ed.) Citation

Duffy, James. A Question of Slavery. Harvard Univ. Pr, 1967.

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