Gannon, N. (2017). The Doldrums and the Helmsley curse (First edition.). Greenwillow Books, an imprint of HarperCollinsPublishers.
Cita Chicago Style (17a ed.)Gannon, Nicholas. The Doldrums and the Helmsley Curse. First edition. New York, NY: Greenwillow Books, an imprint of HarperCollinsPublishers, 2017.
Cita MLA (8a ed.)Gannon, Nicholas. The Doldrums and the Helmsley Curse. First edition. Greenwillow Books, an imprint of HarperCollinsPublishers, 2017.
Precaución: Estas citas no son 100% exactas.