Citazione Stile APA (7a Edizione)
ebrary, Inc. (2005). Comfort zones: Planning for a fulfilling retirement, fifth edition (5th ed.). Thomson Course Technology PTR.
Citazione stile Chigago Style (17a edizione)
ebrary, Inc. Comfort Zones: Planning for a Fulfilling Retirement, Fifth Edition. 5th ed. Boston, MA: Thomson Course Technology PTR, 2005.
Citatione MLA (9a ed.)
ebrary, Inc. Comfort Zones: Planning for a Fulfilling Retirement, Fifth Edition. 5th ed. Thomson Course Technology PTR, 2005.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.