APA aipamena

Obama, B. (2020). A promised land (First edition.). Crown.

Chicago Style aipamena

Obama, Barack. A Promised Land. First edition. New York: Crown, 2020.

MLA aipamena

Obama, Barack. A Promised Land. First edition. Crown, 2020.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.