APA aipamena

Julie Penn, E. R. (1983). The Sandcastle Competition.

Chicago Style aipamena

Julie Penn, Emilia Robledo. The Sandcastle Competition. 1983.

MLA aipamena

Julie Penn, Emilia Robledo. The Sandcastle Competition. 1983.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.