Παραπομπή σε μορφή APA (7η εκδ.)

Watkins, P. C. (2014). Gratitude and the Good Life: Toward a Psychology of Appreciation. Springer Netherlands : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Watkins, Philip C. Gratitude and the Good Life: Toward a Psychology of Appreciation. Dordrecht: Springer Netherlands : Imprint: Springer, 2014.

Παραπομπή σε μορφή MLA (8th εκδ.)

Watkins, Philip C. Gratitude and the Good Life: Toward a Psychology of Appreciation. Springer Netherlands : Imprint: Springer, 2014.