APA (7th ed.) Citation

Frost, H. (2011). Usury. Encyclopedia of Christianity online. doi:10.1163/2211-2685_eco_U.31

Chicago Style (17th ed.) Citation

Frost, Herbert. "Usury." Encyclopedia of Christianity Online 2011, https://doi.org/10.1163/2211-2685_eco_U.31.

MLA (8th ed.) Citation

Frost, Herbert. "Usury." Encyclopedia of Christianity Online, 2011, https://doi.org/10.1163/2211-2685_eco_U.31.