APA

Polak J. F., Shemanski L., O'Leary D. H., Lefkowitz D., Price T. R., Savage P. J., Brant W. E. & Reid C. (19980914). Hypoechoic plaque at US of the carotid artery: an independent risk factor for incident stroke in adults aged 65 years or older. Cardiovascular Health Study. : Radiology.

Chicago

Polak J F, Shemanski L, O'Leary D H, Lefkowitz D, Price T R, Savage P J, Brant W E and Reid C. 19980914. Hypoechoic plaque at US of the carotid artery: an independent risk factor for incident stroke in adults aged 65 years or older. Cardiovascular Health Study. : Radiology.

Harvard

Polak J. F., Shemanski L., O'Leary D. H., Lefkowitz D., Price T. R., Savage P. J., Brant W. E. and Reid C. (19980914). Hypoechoic plaque at US of the carotid artery: an independent risk factor for incident stroke in adults aged 65 years or older. Cardiovascular Health Study. : Radiology.

MLA

Polak J F, Shemanski L, O'Leary D H, Lefkowitz D, Price T R, Savage P J, Brant W E and Reid C. Hypoechoic plaque at US of the carotid artery: an independent risk factor for incident stroke in adults aged 65 years or older. Cardiovascular Health Study. : Radiology. 19980914.