Syd Hoff. (1997). "Happy Birthday, Danny and the Dinosaur! (I Can Read Level 1)" (Reprint.). HarperCollins.
Cita Chicago Style (17a ed.)Syd Hoff. "Happy Birthday, Danny and the Dinosaur! (I Can Read Level 1)". Reprint. HarperCollins, 1997.
Cita MLA (9a ed.)Syd Hoff. "Happy Birthday, Danny and the Dinosaur! (I Can Read Level 1)". Reprint. HarperCollins, 1997.
Precaución: Estas citas no son 100% exactas.