APA
Carnegie D., . (2011). How to ein friends and influence people in the digital age # How to win friends and influence people in the digital age. London # Great Britain: Simon & Schuster.
Chicago
Carnegie Dale, . 2011. How to ein friends and influence people in the digital age # How to win friends and influence people in the digital age. London # Great Britain: Simon & Schuster.
Harvard
Carnegie D., . (2011). How to ein friends and influence people in the digital age # How to win friends and influence people in the digital age. London # Great Britain: Simon & Schuster.
MLA
Carnegie Dale, . How to ein friends and influence people in the digital age # How to win friends and influence people in the digital age. London # Great Britain: Simon & Schuster. 2011.