In 2014 her novel "En el corazón de la noche" was launched in Buenos Aires and second and third editions were launched by Penguin Random House in Bogota and Spain respectively. Her short stories appeared in Spain, the U.S., France, England, Italy, Poland and Japan. From 1975 to 1995, she worked as a syndicated columnist for several periodicals, including "La Prensa", "Panama America", and "Cambio". She served as ABC News correspondent in Panama and as consultant at Canal (channel) 5 (FETV) in Panama. In 1990 she collaborated on the twenty-first edition of the Dictionary of the Spanish Royal Academy (DRAE) and the second edition of the Dictionary of "Colombianismos" for the Colombian Academy. She was the founder of the Panamanian chapter of the PEN-International and served as one of the seven executive council members of PEN from 1997 to 2002. Until 2004, she was a member of the Board of Trustees of the PEN International foundation. She also served as an International Vice President at PEN International. Guardia's husband was Ricardo Alfaro, grandson of former Panamanian Presidents, Ricardo J. Alfaro and Alcibiades Arosemena. They had a daughter, Cristina Alfaro Carlis (Mrs. E. Scott Carlis) who lives with her husband and children in Los Ángeles, California and San Juan Capistrano, California. There were two grandchildren. Guardia and her husband divided their time between Bogotá, Panama City and Los Angeles. She died in Bogota, 13 May 2019.