Heppenstall Company. Metallurgical Dept. (1948). Effects of alloying elements and the tensile and hardness properties of carbon and alloy steel (Rev. ed.). s.n.
Čikaški stil citiranja (17. izdanje)Heppenstall Company. Metallurgical Dept. Effects of Alloying Elements and the Tensile and Hardness Properties of Carbon and Alloy Steel. Rev. ed. Pittsburgh: s.n, 1948.
MLA način citiranja (9. izdanje)Heppenstall Company. Metallurgical Dept. Effects of Alloying Elements and the Tensile and Hardness Properties of Carbon and Alloy Steel. Rev. ed. s.n, 1948.
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