What is the difference between family social work and family therapy?

What is the difference between family social work and family therapy?
 
  a. Family therapy relies on office-based intervention to help families make systemic changes while family social work can be both home-based and community based, often unfolding in the same time and space as family life and focusing on such things as daily routines and social environment.
  b. Family therapy involves working in the community with family to assess their functioning which family social work is in the office assessing a families functioning.
  c. Family therapy involves working solely in the community to provide interventions to a family while family social work relies on office-based intervention to help families make systemic changes.
  d. Family therapy relies on daily routines, skills and interactions while family social work focuses on working with families on providing concrete services usually in an office setting.