APA (7th ed.) Citation

Waley, D. (1961). The Papal state in the thirteenth century / by D. Waley. Macmillan.

Chicago Style (17th ed.) Citation

Waley, D. The Papal State in the Thirteenth Century / by D. Waley. Macmillan, 1961.

MLA (9th ed.) Citation

Waley, D. The Papal State in the Thirteenth Century / by D. Waley. Macmillan, 1961.

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