Nagle, F. J., & Balke, B. (1964). The gradational step test for assessing cardiorespiratory capacity: An experimental evaluation of treadmill and step test procedures. Federal Aviation Agency, Office of Aviation Medicine, Civil Aeromedical Research Institute.
Chicago Style (17th ed.) CitationNagle, Francis J., and Bruno Balke. The Gradational Step Test for Assessing Cardiorespiratory Capacity: An Experimental Evaluation of Treadmill and Step Test Procedures. Oklahoma City, Okla.: Federal Aviation Agency, Office of Aviation Medicine, Civil Aeromedical Research Institute, 1964.
MLA (9th ed.) CitationNagle, Francis J., and Bruno Balke. The Gradational Step Test for Assessing Cardiorespiratory Capacity: An Experimental Evaluation of Treadmill and Step Test Procedures. Federal Aviation Agency, Office of Aviation Medicine, Civil Aeromedical Research Institute, 1964.