Below are the references and suggested reading on this topic:
Clinical Practice Guidelines:
Austin M-P , Highet NJ and the Guidelines Expert Advisory Committee (2011) Clinical Practice Guidelines for depression and related disorders – anxiety, bipolar disorder and puerperal psychosis – in the perinatal period. A guideline for primary care health professionals. Melbourne: beyondblue: the national depression initiative.
The incidence of postpartum depression in fathers:
Paulson, J.F, Bazemore, S.D (2010) Prenatal and postpartum depression in fathers and its association with maternal depression: a meta-analysis. Journal of the American Medical Association. 303 (19) 1961-1969.