Patterson, W. P. (1998). How the Enneagram Came to Market. Taking with the left hand, 21-46.
Citazione stile Chigago Style (17a edizione)Patterson, William Patrick. "How the Enneagram Came to Market." Taking with the Left Hand 1998: 21-46.
Citatione MLA (8a ed.)Patterson, William Patrick. "How the Enneagram Came to Market." Taking with the Left Hand, 1998, pp. 21-46.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.