APA (7th ed.) Citation

Beck, J. H. (1967). Jacopo della Quercia's portal of San Petronio in Bologna.

Chicago Style (17th ed.) Citation

Beck, James H. Jacopo Della Quercia's Portal of San Petronio in Bologna. Ann Arbor, Mich, 1967.

MLA (9th ed.) Citation

Beck, James H. Jacopo Della Quercia's Portal of San Petronio in Bologna. 1967.