The mysteries of Udolpho:
a romance interspersed with some pieces of poetry;

APA Citation

Radcliffe, A. Ward. (1966). The mysteries of Udolpho: a romance interspersed with some pieces of poetry. London: Oxford U.P..

MLA Citation

Radcliffe, Ann Ward, 1764-1823. The Mysteries of Udolpho: a Romance Interspersed With Some Pieces of Poetry. London: Oxford U.P., 1966.

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