APA aipamena

(2006). Zappy 2 Teacher's Resource Kit. Porto Editora.

Chicago Style aipamena

Zappy 2 Teacher's Resource Kit. Porto Editora, 2006.

MLA aipamena

Zappy 2 Teacher's Resource Kit. Porto Editora, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.