APA

Caraballo R. S., Giovino G. A., Pechacek T. F., Mowery P. D., Richter P. A., Strauss W. J., Sharp D. J., Eriksen M. P., Pirkle J. L. & Maurer K. R. (19980722). Racial and ethnic differences in serum cotinine levels of cigarette smokers: Third National Health and Nutrition Examination Survey, 1988-1991. : JAMA.

Chicago

Caraballo R S, Giovino G A, Pechacek T F, Mowery P D, Richter P A, Strauss W J, Sharp D J, Eriksen M P, Pirkle J L and Maurer K R. 19980722. Racial and ethnic differences in serum cotinine levels of cigarette smokers: Third National Health and Nutrition Examination Survey, 1988-1991. : JAMA.

Harvard

Caraballo R. S., Giovino G. A., Pechacek T. F., Mowery P. D., Richter P. A., Strauss W. J., Sharp D. J., Eriksen M. P., Pirkle J. L. and Maurer K. R. (19980722). Racial and ethnic differences in serum cotinine levels of cigarette smokers: Third National Health and Nutrition Examination Survey, 1988-1991. : JAMA.

MLA

Caraballo R S, Giovino G A, Pechacek T F, Mowery P D, Richter P A, Strauss W J, Sharp D J, Eriksen M P, Pirkle J L and Maurer K R. Racial and ethnic differences in serum cotinine levels of cigarette smokers: Third National Health and Nutrition Examination Survey, 1988-1991. : JAMA. 19980722.