Clayton, R. B. E. (1969). Steroids and terpenoids.
Chicago Style aipamenaClayton, R B; Ed. Steroids and Terpenoids. New York, Academic Press, 1969.
MLA aipamenaClayton, R B; Ed. Steroids and Terpenoids. 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.