See here for an extensive story about Puerto Rico’s Republican presidential primary. That primary will be held March 18, a Sunday. The story does not say who is on that ballot, but six names will appear: Newt Gingrich, Fred Karger, Ron Paul, Buddy Roemer, Mitt Romney, and Rick Santorum. Roemer won the ballot position drawing and will be listed first.
The order of the candidates on the ballot is
1- Roemer;
2- Romney;
3- Gingrich;
4- Paul;
5- Karger;
6- Santorum.
The ballot will have 6 columns, one for each candidate. The picture of each candidate will appear on top of the ballot, followed by their list of delegates and alternates. Romney, Gingrich, Paul and Santorum have filed delegate slates.
The following link shows the actual sample ballot.
http://209.68.12.238/Primarias2012Rep/docs/PapeletaModelo.pdf