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 Spencer Kagan
 
 Kagan, Spencer; Romero, Clarence (1977): Non-adaptive assertiveness of Anglo American and Mexican American children of two ages [Non-adaptive assertiveness of Anglo American and Mexican American children of two ages]. R. interam. Psicol. 11(1), 27-32 (eng.). 
 
 Kagan, Spencer (1976): Preference for control in rural Mexican and urban Anglo American children [Preference for control in rural Mexican and urban Anglo American children]. R. interam. Psicol. 10(1-2), 51-59 (eng.).