Lua APA (7ú heag.)
Duggal, S. (2017). Limit state design of steel structures (2nd ed.). McGraw Hill Education(I) Pvt Ltd.
Lua i Stíl Chicago (17ú heag.)
Duggal, S.K. Limit State Design of Steel Structures. 2nd ed. Chennai: McGraw Hill Education(I) Pvt Ltd, 2017.
Lua MLA (9ú heag.)
Duggal, S.K. Limit State Design of Steel Structures. 2nd ed. McGraw Hill Education(I) Pvt Ltd, 2017.
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