3 Letters of Reference 1) former employer, 2) School mate 3) workmate

I want three different half a page to 3/4 page reference letters for the graduate nursing application. the 1st school be written like its been written by my former school make, 2nd) my current employer, i will provide you more info about my job. 3rd) from my former work mate who advanced to Graduate nursing school and he is recomending me to pursue higher education as he understands my ability in this field.