APA
Dungworth R., Gibson R., Gower T., Allman H. & Sherman C. (1998). [Les] Pop-ups. Londres: Usborne publishing ltd.
Chicago
Dungworth Richard, Gibson Ray, Gower Teri, Allman Howard and Sherman Christine. 1998. [Les] Pop-ups. Londres: Usborne publishing ltd.
Harvard
Dungworth R., Gibson R., Gower T., Allman H. and Sherman C. (1998). [Les] Pop-ups. Londres: Usborne publishing ltd.
MLA
Dungworth Richard, Gibson Ray, Gower Teri, Allman Howard and Sherman Christine. [Les] Pop-ups. Londres: Usborne publishing ltd. 1998.