APA (7th ed.) Citation

Carey, H. C. (1868). Letters on international copyright (2d. ed.). Hurd and Houghton.

Chicago Style (17th ed.) Citation

Carey, Henry Charles. Letters on International Copyright. 2d. ed. New York: Hurd and Houghton, 1868.

MLA (9th ed.) Citation

Carey, Henry Charles. Letters on International Copyright. 2d. ed. Hurd and Houghton, 1868.