Παραπομπή σε μορφή APA (7η εκδ.)

Portella, M., Harmer, C., Flint, J., Cowen, P., & Goodwin, G. (2004). Elevated waking cortisol levels in neuroticism: A biological vulnerability factor for depressive disorders?

Παραπομπή σε μορφή Chicago (17η εκδ.)

Portella, M., C. Harmer, J. Flint, P. Cowen, και G. Goodwin. Elevated Waking Cortisol Levels in Neuroticism: A Biological Vulnerability Factor for Depressive Disorders? 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Portella, M., et al. Elevated Waking Cortisol Levels in Neuroticism: A Biological Vulnerability Factor for Depressive Disorders? 2004.