APA

Gramling W., Hopkins J., Cumberledge G., Bhajandas A. & Nicotera R. (1978). Pavement condition measurement needs and methods. Harrisburg, PA: Pennsylvania Department of Transportation. Bureau of Materials, Testing and Research.

Chicago

Gramling WL, Hopkins JG,III, Cumberledge G, Bhajandas A and Nicotera RM. 1978. Pavement condition measurement needs and methods. Harrisburg, PA: Pennsylvania Department of Transportation. Bureau of Materials, Testing and Research.

Harvard

Gramling W., Hopkins J., Cumberledge G., Bhajandas A. and Nicotera R. (1978). Pavement condition measurement needs and methods. Harrisburg, PA: Pennsylvania Department of Transportation. Bureau of Materials, Testing and Research.

MLA

Gramling WL, Hopkins JG,III, Cumberledge G, Bhajandas A and Nicotera RM. Pavement condition measurement needs and methods. Harrisburg, PA: Pennsylvania Department of Transportation. Bureau of Materials, Testing and Research. 1978.