Kufeld, A. 1., Ramos Vargas, A. 1., Argueta Cañas, M. 1., Manriquez, J., & Ross, S. (1990). El Salvador (First edition.). New York, N.Y.: W.W. Norton & Company.

Kufeld, Adam 1950-, Arnoldo 1965- Ramos Vargas, Manlio 1935- Argueta Cañas, Jennifer Manriquez, and Stacey Ross. El Salvador. First edition. New York, N.Y.: W.W. Norton & Company, 1990.

Kufeld, Adam 1950-, et al. El Salvador. First edition. New York, N.Y.: W.W. Norton & Company, 1990.