(1973). Three membered rings. Springer Verlag.
Chicago Style (17th ed.) ZitazioaThree Membered Rings. Berlin: Springer Verlag, 1973.
MLA (9th ed.) ZitazioaThree Membered Rings. Springer Verlag, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.