APA (7th ed.) Citation
Ward, B., & Nkrumah, K. 5 Ideas That Change the World. Norton.
Chicago Style (17th ed.) Citation
Ward, Barbara, and Kwame Nkrumah. 5 Ideas That Change the World. Nueva York, EUA: Norton.
MLA (9th ed.) Citation
Ward, Barbara, and Kwame Nkrumah. 5 Ideas That Change the World. Norton.
Warning: These citations may not always be 100% accurate.