González Gutiérrez, José Luis, Cecilia Peñacoba Puente, Ricardo Moreno Rodríguez, Almudena López López, and Lilian Velasco Furlong. 2006. “Nursing Motives for Helping Scale (N-MHS): Reliability and Validity”. The Spanish Journal of Psychology 9, nº 1:: 103-12. https://revistas.ucm.es/index.php/SJOP/article/view/SJOP0606120103A