Vagin, V. V. (1999). The twelve days of Christmas. HarperCollinsPublishers.
Cita Chicago Style (17a ed.)Vagin, Vladimir Vasilʹevich. The Twelve Days of Christmas. New York: HarperCollinsPublishers, 1999.
Cita MLA (8a ed.)Vagin, Vladimir Vasilʹevich. The Twelve Days of Christmas. HarperCollinsPublishers, 1999.
Precaución: Estas citas no son 100% exactas.