def extend_initials(*arguments)
      arguments.each do |with_first, for_last|
        names.each do |name|
          name.extend_initials(with_first, for_last)
        end
      end

      self
    end
def extend_initials(*arguments)
      arguments.each do |with_first, for_last|
        names.each do |name|
          name.extend_initials(with_first, for_last)
        end
      end

      self
    end
call-seq:
   b.extend_initials(['Edgar Allen', 'Poe'], ['Nathaniel', 'Hawthorne'])
   #=> Extends the initials in names like 'E.A. Poe' or 'Hawethorne, N.'
       in the bibliography.

 Extends the initials for the given names. Returns the Bibliography.