APA (7th ed.) Citation

Obama, B. (2020). A promised land / Barack Obama. Viking, an imprint of Penguin Books.

Chicago Style (17th ed.) Citation

Obama, Barack. A Promised Land / Barack Obama. UK: Viking, an imprint of Penguin Books, 2020.

MLA (9th ed.) Citation

Obama, Barack. A Promised Land / Barack Obama. Viking, an imprint of Penguin Books, 2020.

Warning: These citations may not always be 100% accurate.