APA (7th ed.) Citation

Opfell, O. S. (1989). Queens, empresses, grand duchesses and regents: Women rulers of Europe, A.D. 1328 - 1989. McFarland.

Chicago Style (17th ed.) Citation

Opfell, Olga S. Queens, Empresses, Grand Duchesses and Regents: Women Rulers of Europe, A.D. 1328 - 1989. Jefferson, NC u.a: McFarland, 1989.

MLA (9th ed.) Citation

Opfell, Olga S. Queens, Empresses, Grand Duchesses and Regents: Women Rulers of Europe, A.D. 1328 - 1989. McFarland, 1989.