@book{ BA1156921X,
  author    = "Gottlieb, Benjamin H.",
  title     = "Social networks and social support",
  publisher = "Sage Publications",
  year      = "1981",
  series    = "Sage studies in community mental health",
  number    = "4",
  URL       = "https://ci.nii.ac.jp/ncid/BA1156921X"
}