Cita APA

Douglas, M. R. (1968). How to make a habit of succeeding. New York: Pyramid Books.

Chicago Style Citation

Douglas, Mack R. How to Make a Habit of Succeeding. New York: Pyramid Books, 1968.

Cita MLA

Douglas, Mack R. How to Make a Habit of Succeeding. New York: Pyramid Books, 1968.