Usatine, R. P. (1999). Skin lesions with white rings.
Chicago Style aipamenaUsatine, R P. Skin Lesions With White Rings. 1999.
MLA aipamenaUsatine, R P. Skin Lesions With White Rings. 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena