APA
Donaldson J., . (2006). Dig, dig, dig !. Oxford: Oxford University Press.
Chicago
Donaldson Julia, . 2006. Dig, dig, dig !. Oxford: Oxford University Press.
Harvard
Donaldson J., . (2006). Dig, dig, dig !. Oxford: Oxford University Press.
MLA
Donaldson Julia, . Dig, dig, dig !. Oxford: Oxford University Press. 2006.