APA (7th ed.) Citation

Cecchini, G., & Pius Ii, P. (1959). The Piccolomini library in Siena cathedral. Opera Metropolitana.

Chicago Style (17th ed.) Citation

Cecchini, Giovanni, and Pope Pius Ii. The Piccolomini Library in Siena Cathedral. Siena: Opera Metropolitana, 1959.

MLA (9th ed.) Citation

Cecchini, Giovanni, and Pope Pius Ii. The Piccolomini Library in Siena Cathedral. Opera Metropolitana, 1959.

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