The Textile Markup (2.4) Reference for Textpattern
Block quotations designate long quotations where a paragraph break is appropriate. It ends with a blank line.
1) Block quotes may include a citation URL immediately following the period:
bq.:http://textpattern.com/ A cited quotation.
2) For more than one paragraph, use two periods. Any block modifier to follow, such as
p. will end the block quotation:
bq.. Beginning of the quotation.
Another paragraph, also part of the quote.
p. Normal text continues here.
code into the box above.