Graff's Textbook of Urinalysis and Body Fluids
-- "The addition of other body fluids to this text makes it a much more marketable competitor. In the past, I did not consider it because of the need to have an additional text, but now it's great!"  -- "I especially like the case studies included in each chapter and the questions that directly apply to lab work. Too often case studies ask too many questions regarding diseases and treatments rather than lab identifications, calculations, etc."