The importance of being Earnest :
a trivial comedy for serious people /
by Oscar Wilde.

APA Citation

Wilde, O. (1928). The importance of being Earnest: a trivial comedy for serious people. New York: Samuel French.

MLA Citation

Wilde, Oscar, 1854-1900. The Importance of Being Earnest: a Trivial Comedy for Serious People. New York: Samuel French, 1928.

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