Gaya APA

Cheal,David, ., Swanson, C, P. (NULL). Family and the state of theory . British:: British: Harvester Wheatsheaf; 1991.

Gaya MLA

Cheal,David, ., Swanson, Carl, P.. "Family and the state of theory". British:: British: Harvester Wheatsheaf; 1991, NULL. Text.