Cita APA (7a ed.)
Frick, D., & Hoefert, H. The Quality of Urban Life: Social, Psychological, and Physical Conditions. Walter de Gruyter.
Cita estilo Chicago (17a ed.)
Frick, Dieter, y Hans-Wolfgang Hoefert. The Quality of Urban Life: Social, Psychological, and Physical Conditions. Berlín, Alemania: Walter de Gruyter.
Cita MLA (9a ed.)
Frick, Dieter, y Hans-Wolfgang Hoefert. The Quality of Urban Life: Social, Psychological, and Physical Conditions. Walter de Gruyter.
Precaución: Estas citas no son 100% exactas.