Norman,, N. C. (1994). Periodicity and the p-block elements (1st.). OUP.
Čikaški stil citiranjaNorman,, Nicholas C. Periodicity and the P-block Elements. 1st. New York: OUP, 1994.
MLA način citiranjaNorman,, Nicholas C. Periodicity and the P-block Elements. 1st. OUP, 1994.
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