Παραπομπή APA

Peale, N. V. (1992). The power of positive living. Vermilion.

Παραπομπή Chicago Style

Peale, Norman Vincent. The Power of Positive Living. London: Vermilion, 1992.

Παραπομπή MLA

Peale, Norman Vincent. The Power of Positive Living. Vermilion, 1992.