APA
Sonja Jefferson, . (2015). Valuable Content Marketing: How to Make Quality Content Your Key to Success. New delhi: Kogan page.
Chicago
Sonja Jefferson, . 2015. Valuable Content Marketing: How to Make Quality Content Your Key to Success. New delhi: Kogan page.
Harvard
Sonja Jefferson, . (2015). Valuable Content Marketing: How to Make Quality Content Your Key to Success. New delhi: Kogan page.
MLA
Sonja Jefferson, . Valuable Content Marketing: How to Make Quality Content Your Key to Success. New delhi: Kogan page. 2015.