The importance of being earnest :
a trivial comedy for serious people /
by Oscar Wilde ; with an introd. by Henry Popkin.

APA Citation

Wilde, O. (1961). The importance of being earnest: a trivial comedy for serious people. San Francisco, Calif.: Chandler Pub. Co..

MLA Citation

Wilde, Oscar, 1854-1900. The Importance of Being Earnest: a Trivial Comedy for Serious People. San Francisco, Calif.: Chandler Pub. Co., 1961.

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