Cita APA (7a ed.)

Frick, D., & Hoefert, H. (1986). The Quality of urban life: Social, psychological, and physical conditions. De Gruyter.

Cita Chicago Style (17a ed.)

Frick, Dieter, y Hans-Wolfgang Hoefert. The Quality of Urban Life: Social, Psychological, and Physical Conditions. Berlin ; New York: De Gruyter, 1986.

Cita MLA (8a ed.)

Frick, Dieter, y Hans-Wolfgang Hoefert. The Quality of Urban Life: Social, Psychological, and Physical Conditions. De Gruyter, 1986.