The prince and the pauper :
a tale for young people of all ages /
by Mark Twain.

APA Citation

Twain, M. (1881). The prince and the pauper: a tale for young people of all ages. New York: Harper & Brothers.

MLA Citation

Twain, Mark, 1835-1910. The Prince And the Pauper: a Tale for Young People of All Ages. New York: Harper & Brothers, 1881.

Warning: These citations may not always be complete (especially for serials).