Tops, M. (2004). Inhibition of approach Cortisol-mediated mechanisms in affect and depression. Rijksuniversiteit te Groningen.
Lua i Stíl Chicago (17ú heag.)Tops, Mattie. Inhibition of Approach Cortisol-mediated Mechanisms in Affect and Depression. Netherlands: Rijksuniversiteit te Groningen, 2004.
Lua MLA (8ú heag.)Tops, Mattie. Inhibition of Approach Cortisol-mediated Mechanisms in Affect and Depression. Rijksuniversiteit te Groningen, 2004.
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