APA
Widmer E., . (2010). Family configurations. Farnham: Ashgate.
Chicago
Widmer Eric, . 2010. Family configurations. Farnham: Ashgate.
Harvard
Widmer E., . (2010). Family configurations. Farnham: Ashgate.
MLA
Widmer Eric, . Family configurations. Farnham: Ashgate. 2010.