APA
Turnbull S., . (2013). Caterpillars and butterflies. Usborne publishing ltd: London.
Chicago
Turnbull Stephanie, . 2013. Caterpillars and butterflies. Usborne publishing ltd: London.
Harvard
Turnbull S., . (2013). Caterpillars and butterflies. Usborne publishing ltd: London.
MLA
Turnbull Stephanie, . Caterpillars and butterflies. Usborne publishing ltd: London. 2013.