Citação norma APA
ebrary, Inc. (2005). Comfort zones: Planning for a fulfilling retirement, fifth edition (5th ed.). Thomson Course Technology PTR.
Citação norma Chicago
ebrary, Inc. Comfort Zones: Planning for a Fulfilling Retirement, Fifth Edition. 5th ed. Boston, MA: Thomson Course Technology PTR, 2005.
Citação norma MLA
ebrary, Inc. Comfort Zones: Planning for a Fulfilling Retirement, Fifth Edition. 5th ed. Thomson Course Technology PTR, 2005.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.