APA (7th ed.) Citation

Burr, B. L., Bullin, J. A., Glover, C. J., & Letton, A. (1993). Improved methods for extracting and recovering asphalts from pavement samples.

Chicago Style (17th ed.) Citation

Burr, Barry Lea, Jerry A. Bullin, Charles J. Glover, and Alan Letton. Improved Methods for Extracting and Recovering Asphalts from Pavement Samples. 1993.

MLA (9th ed.) Citation

Burr, Barry Lea, et al. Improved Methods for Extracting and Recovering Asphalts from Pavement Samples. 1993.