Não informado. United States quarterly book list. Library of Congress.
Chicago-Zitierstil (17. Ausg.)Não informado. United States Quarterly Book List. Washington: Library of Congress.
MLA-Zitierstil (8. Ausg.)Não informado. United States Quarterly Book List. Library of Congress.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.