Clinical and Laboratory Standards Institute (CLSI). Collection of Diagnostic Venous Blood Specimens. 7th ed. CLSI document GP41. Wayne, PA: CLSI: 2017.
Clinical and Laboratory Standards Institute (CLSI). Collection of Capillary Blood Specimens. 7th ed. CLSI document GP42. Wayne, PA: CLSI: 2020.
Clinical and Laboratory Standards Institute (CLSI). Procedures for the Handling and Processing of Blood Specimens for Common Laboratory Tests; Approved Guideline. Fourth Edition. CLSI document GP44-A4. Wayne, PA: CLSI: 2010.
Ernst DJ. Applied Phlebotomy. Baltimore, MD: Lippincott Williams & Wilkins: 2005.
Ernst DJ, Ernst C. The Lab Draw Answer Book 2nd ed. Corydon, IN: Center for Phlebotomy Education; 2017; pg. 49, 176,185.