APA (7th ed.) Citation

Gladstone, W. E., & Schaff, F. El Papa y el poder civil.

Chicago Style (17th ed.) Citation

Gladstone, W. E., and Felipe Schaff. El Papa Y El Poder Civil.

MLA (8th ed.) Citation

Gladstone, W. E., and Felipe Schaff. El Papa Y El Poder Civil.

Warning: These citations may not always be 100% accurate.