Recaída : 2013-2014 / Alberto Quintana. (OCLC #884794517)
RDA 188.8.131.52 says to transcribe an edition statement as it appears on the source of information, which in this case is: 1a edición
I often hear that “there are no abbreviations in RDA” but this is not quite true. This abbreviation is appropriate, because that is how it appears on the piece; it should not be spelled out as “Primera edición”, but it should not be abbreviated further to “1a ed.” either.
Cataloged in a MARC record using ISBD punctuation, this statement would appear as:
250 __ ǂa 1a edición.