APA aipamena

Collins. (2011). CollinsEasy Learning Spanish Grammar. HarperCollins Publishers.

Chicago Style aipamena

Collins. CollinsEasy Learning Spanish Grammar. Great Britain: HarperCollins Publishers, 2011.

MLA aipamena

Collins. CollinsEasy Learning Spanish Grammar. HarperCollins Publishers, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.