APA (7th ed.) Citation

Duckett, M. (1964). Mark Twain and Bret Harte. University of Oklahoma Press.

Chicago Style (17th ed.) Citation

Duckett, Margaret. Mark Twain and Bret Harte. Norman: University of Oklahoma Press, 1964.

MLA (9th ed.) Citation

Duckett, Margaret. Mark Twain and Bret Harte. University of Oklahoma Press, 1964.