APA (7th ed.) Citation

Bullas, J. C., & West, G. (1991). Specifying clean, hard and durable aggregate for bitumen macadam roadbase. Transport and Road Research Laboratory.

Chicago Style (17th ed.) Citation

Bullas, J. C., and G. West. Specifying Clean, Hard and Durable Aggregate for Bitumen Macadam Roadbase. Crowthorne: Transport and Road Research Laboratory, 1991.

MLA (9th ed.) Citation

Bullas, J. C., and G. West. Specifying Clean, Hard and Durable Aggregate for Bitumen Macadam Roadbase. Transport and Road Research Laboratory, 1991.