Burnell, I. The power of positive doing. International Personal Development, Goodwill Publishing House.
Style de citation Chicago (17e éd.)Burnell, Ivan. The Power of Positive Doing. Center Ossipee, NH : New Delhi: International Personal Development, Goodwill Publishing House.
Style de citation MLA (8e éd.)Burnell, Ivan. The Power of Positive Doing. International Personal Development, Goodwill Publishing House.
Attention : ces citations peuvent ne pas être correctes à 100%.