Tohutoro APA (7th ed.)
Duggal, S. (2018). Building materials (4th ed.). New Age International.
Tohutoru Kātū Chicago (17th ed.)
Duggal, S.K. Building Materials. 4th ed. Kolkata: New Age International, 2018.
Tohutoro MLA (9th ed.)
Duggal, S.K. Building Materials. 4th ed. New Age International, 2018.
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