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 Ángel C. Martínez-Urrutia
 
 García, Lázaro; Martínez-Urrutia, Ángel C. (1984): Self-efficacy theory applied to a case of school phobia [La teoría de auto-eficacia aplicada al caso de un niño com fobia de ir a la escuela]. R. interam. Psicol. 18(1-2), 65-74 (eng.). 
 
 Martínez-Urrutia, Ángel C.; Spielberger, Charles D. (1973): The relationship between state-trait anxiety and intelligence in Puerto Rican psychiatric patients [The relationship between state-trait anxiety and intelligence in Puerto Rican psychiatric patients]. R. interam. Psicol. 7(3-4), 199-214 (eng.). 
 
 Spielberger, Charles D.; Gonzales-Reigoso, Fernando; Martínez-Urrutia, Ángel C.; Natalicio, Luiz F. S.; Natalicio, Diana S. (1971): Development of the Spanish edition of the State-Trait Anxiety Inventory [Development of the Spanish edition of the State-Trait Anxiety Inventory]. R. interam. Psicol. 5(3-4), 145-158 (eng.).