APA (7th ed.) Citation

Twain, M., & Warner, C. D. (1880). The gilded age: A tale of to-day. American Publishing Company.

Chicago Style (17th ed.) Citation

Twain, Mark, and Charles Dudley Warner. The Gilded Age: A Tale of To-day. Hartford, Conn.: American Publishing Company, 1880.

MLA (9th ed.) Citation

Twain, Mark, and Charles Dudley Warner. The Gilded Age: A Tale of To-day. American Publishing Company, 1880.