APA

Technical Recommendations for Highways, TRH 7:1972 & [Committee of State Road Authorities]. (1972). The use of bitumen emulsions in the construction and maintenance of roads. Pretoria: Technical Recommendations for Highways.

Chicago

Technical Recommendations for Highways, TRH 7:1972 and [Committee of State Road Authorities]. 1972. The use of bitumen emulsions in the construction and maintenance of roads. Pretoria: Technical Recommendations for Highways.

Harvard

Technical Recommendations for Highways, TRH 7:1972 and [Committee of State Road Authorities]. (1972). The use of bitumen emulsions in the construction and maintenance of roads. Pretoria: Technical Recommendations for Highways.

MLA

Technical Recommendations for Highways, TRH 7:1972 and [Committee of State Road Authorities]. The use of bitumen emulsions in the construction and maintenance of roads. Pretoria: Technical Recommendations for Highways. 1972.