APA (7th ed.) Citation

(1828). [Retrato del Papa Sergio IV]. s.n.

Chicago Style (17th ed.) Citation

[Retrato Del Papa Sergio IV]. [S.l.: s.n, 1828.

MLA (9th ed.) Citation

[Retrato Del Papa Sergio IV]. s.n, 1828.

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