Bubolz, Margaret M.; Eicher, Joanne B.; Evers, Sandra J.; Sontag, M. Suzanne (1980). "A human ecological approach to quality of life: Conceptual framework and results of a preliminary study". Social Indicators Research. 7 (1–4): 103–136. doi:10.1007/bf00305595. S2CID143456994.
Bubolz, Margaret M.; Eicher, Joanne B.; Evers, Sandra J.; Sontag, M. Suzanne (1980). "A human ecological approach to quality of life: Conceptual framework and results of a preliminary study". Social Indicators Research. 7 (1–4): 103–136. doi:10.1007/bf00305595. S2CID143456994.