Once in a lifetime. A comedy in three acts.

MLA

Hart, Moss, and George S Kaufman. Once In a Lifetime. A Comedy In Three Acts. London, 1960.

APA

Hart, M., & Kaufman, G. S. (1960). Once in a lifetime. A comedy in three acts. London.

Chicago

Hart, Moss, and George S Kaufman. Once In a Lifetime. A Comedy In Three Acts. London, 1960.