APA (7th ed.) Citation

Khan, A. U., & unknown. (1981). An Investigation of properties of concrete made with concrete rubble as aggregate.

Chicago Style (17th ed.) Citation

Khan, Asfahan Ullah, and unknown. An Investigation of Properties of Concrete Made with Concrete Rubble as Aggregate. 1981.

MLA (9th ed.) Citation

Khan, Asfahan Ullah, and unknown. An Investigation of Properties of Concrete Made with Concrete Rubble as Aggregate. 1981.

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