MURRELL, J. Valence theory. E.L.B.S. and Wiley.
Chicago Style (17th ed.) ZitazioaMURRELL, J.N. Valence Theory. London: E.L.B.S. and Wiley.
MLA (9th ed.) ZitazioaMURRELL, J.N. Valence Theory. E.L.B.S. and Wiley.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.