APA (7th ed.) Citation

Ritchie, C. I. A. (1973). Soft stone carving / C.A.I. (i.e. C.I.A.) Ritchie. Academy Editions (etc.).

Chicago Style (17th ed.) Citation

Ritchie, Carson I. A. Soft Stone Carving / C.A.I. (i.e. C.I.A.) Ritchie. London: Academy Editions (etc.), 1973.

MLA (9th ed.) Citation

Ritchie, Carson I. A. Soft Stone Carving / C.A.I. (i.e. C.I.A.) Ritchie. Academy Editions (etc.), 1973.

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