Gil-Pareja, D., León Mejía, A., Sánchez-Cabrero, R. y Pericacho-Gómez, F.J. 2021. Impact of teacher performance observation on the professional development. Revista San Gregorio. 1, 47 (sep. 2021). DOI:https://doi.org/10.36097/rsan.v1i47.1576.