APA (7th ed.) Citation

Al-Senan, S. H., & unknown. (1979). Economic proportioning of continuous steel I - beam.

Chicago Style (17th ed.) Citation

Al-Senan, Shukri Hasan, and unknown. Economic Proportioning of Continuous Steel I - Beam. 1979.

MLA (9th ed.) Citation

Al-Senan, Shukri Hasan, and unknown. Economic Proportioning of Continuous Steel I - Beam. 1979.

Warning: These citations may not always be 100% accurate.