APA (7th ed.) Citation

Twain, M., & Warner, C. D. (1901). Gilded age: A tale of to-day (Harper's library ed.). Harper.

Chicago Style (17th ed.) Citation

Twain, Mark, and Charles Dudley Warner. Gilded Age: A Tale of To-day. Harper's library ed. New York: Harper, 1901.

MLA (9th ed.) Citation

Twain, Mark, and Charles Dudley Warner. Gilded Age: A Tale of To-day. Harper's library ed. Harper, 1901.