APA (7th ed.) Citation

Carretto, C., Carretto, D., & Sibilia, G. C. (1991). Letters to Dolcidia: 1954-1983. Orbis Books.

Chicago Style (17th ed.) Citation

Carretto, Carlo, Dolcidia Carretto, and Gian Carlo Sibilia. Letters to Dolcidia: 1954-1983. Maryknoll, N.Y.: Orbis Books, 1991.

MLA (8th ed.) Citation

Carretto, Carlo, et al. Letters to Dolcidia: 1954-1983. Orbis Books, 1991.