Spiegel, L., & Spiegel, L. (1986). Applied Structural Steel Design Leonard Spiegel And George F. Limbrunner. Prentice-Hall.
Čikaški stil citiranja (17. izdanje)Spiegel, Leonard, i Leonard Spiegel. Applied Structural Steel Design Leonard Spiegel And George F. Limbrunner. Prentice-Hall, 1986.
MLA način citiranja (8. izdanje)Spiegel, Leonard, i Leonard Spiegel. Applied Structural Steel Design Leonard Spiegel And George F. Limbrunner. Prentice-Hall, 1986.
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