Ross, T., & Guhl, M. (1991). Sopa de piedra (1a. ed.). Norma.
Chicago Style (17th ed.) CitationRoss, Tony, and Mercedes Guhl. Sopa De Piedra. 1a. ed. Colombia: Norma, 1991.
MLA (9th ed.) CitationRoss, Tony, and Mercedes Guhl. Sopa De Piedra. 1a. ed. Norma, 1991.
Warning: These citations may not always be 100% accurate.