APA (7th ed.) Citation

Petry, R. C. (1941). Francis of Assisi: Apostle of poverty. Duke University Press.

Chicago Style (17th ed.) Citation

Petry, Ray C. Francis of Assisi: Apostle of Poverty. Durham, N. C.: Duke University Press, 1941.

MLA (8th ed.) Citation

Petry, Ray C. Francis of Assisi: Apostle of Poverty. Duke University Press, 1941.