APA

National Library of Medicine U.S, .PubMed central: an archive of life science journals. Bethesda, Md: NCBI U.S. National Library of Medicine, NIH, Dept. of Health and Human Services.

Chicago

National Library of Medicine U.S, .PubMed central: an archive of life science journals. Bethesda, Md: NCBI U.S. National Library of Medicine, NIH, Dept. of Health and Human Services.

Harvard

National Library of Medicine U.S, .PubMed central: an archive of life science journals. Bethesda, Md: NCBI U.S. National Library of Medicine, NIH, Dept. of Health and Human Services.

MLA

National Library of Medicine U.S, .Bethesda, Md: NCBI U.S. National Library of Medicine, NIH, Dept. of Health and Human Services. .