Schwab, I. R. (2004). Better one or two? BMJ Group.
Chicago Style aipamenaSchwab, I R. Better One or Two? BMJ Group, 2004.
MLA aipamenaSchwab, I R. Better One or Two? BMJ Group, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena