APA

National Institutes of Health (U.S.), . (1991). Medical record--consent for exercise testing. [Washington, D.C: .

Chicago

National Institutes of Health (U.S.), . 1991. Medical record--consent for exercise testing. [Washington, D.C: .

Harvard

National Institutes of Health (U.S.), . (1991). Medical record--consent for exercise testing. [Washington, D.C: .

MLA

National Institutes of Health (U.S.), . Medical record--consent for exercise testing. [Washington, D.C: . 1991.