APA

Armstrong W. F., Pellikka P. A., Ryan T., Crouse L. & Zoghbi W. A. (19980409). Stress echocardiography: recommendations for performance and interpretation of stress echocardiography. Stress Echocardiography Task Force of the Nomenclature and Standards Committee of the American Society of Echocardiography. : Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography.

Chicago

Armstrong W F, Pellikka P A, Ryan T, Crouse L and Zoghbi W A. 19980409. Stress echocardiography: recommendations for performance and interpretation of stress echocardiography. Stress Echocardiography Task Force of the Nomenclature and Standards Committee of the American Society of Echocardiography. : Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography.

Harvard

Armstrong W. F., Pellikka P. A., Ryan T., Crouse L. and Zoghbi W. A. (19980409). Stress echocardiography: recommendations for performance and interpretation of stress echocardiography. Stress Echocardiography Task Force of the Nomenclature and Standards Committee of the American Society of Echocardiography. : Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography.

MLA

Armstrong W F, Pellikka P A, Ryan T, Crouse L and Zoghbi W A. Stress echocardiography: recommendations for performance and interpretation of stress echocardiography. Stress Echocardiography Task Force of the Nomenclature and Standards Committee of the American Society of Echocardiography. : Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography. 19980409.