APA

Kristal A. R., . (20090127). Are clinical trials the "gold standard" for cancer prevention research?. : Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology.

Chicago

Kristal Alan R, . 20090127. Are clinical trials the "gold standard" for cancer prevention research?. : Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology.

Harvard

Kristal A. R., . (20090127). Are clinical trials the "gold standard" for cancer prevention research?. : Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology.

MLA

Kristal Alan R, . Are clinical trials the "gold standard" for cancer prevention research?. : Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology. 20090127.