This isn't a Rails question. But, can't you just put the double quotes insides single quotes?
csv << [45678, 45678, '"stringa"'] -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
