Ervine, S. J. G. (1923). Mary, Mary, quite contrary: A light comedy in four acts. Macmillan.
Chicago-viite (17. p.)Ervine, St. John G. Mary, Mary, Quite Contrary: A Light Comedy in Four Acts. N.Y.: Macmillan, 1923.
MLA-viite (8. p.)Ervine, St. John G. Mary, Mary, Quite Contrary: A Light Comedy in Four Acts. Macmillan, 1923.
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