APA (7th ed.) Citation

Ambrosini, M. L., & Willis, M. (1970). The secret archives of the Vatican. Eyre & Spottiswoode.

Chicago Style (17th ed.) Citation

Ambrosini, Maria Luisa, and Mary Willis. The Secret Archives of the Vatican. London: Eyre & Spottiswoode, 1970.

MLA (9th ed.) Citation

Ambrosini, Maria Luisa, and Mary Willis. The Secret Archives of the Vatican. Eyre & Spottiswoode, 1970.

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