APA (7e ed.) Bronvermelding

National Association of Australian State Road Authorities. (1974). Guide to the selection and testing of gravel for pavement construction (2nd metric ed.). National Association of Australian State Road Authorities.

Chicago (17e ed.) Bronvermelding

National Association of Australian State Road Authorities. Guide to the Selection and Testing of Gravel for Pavement Construction. 2nd metric ed. Sydney: National Association of Australian State Road Authorities, 1974.

MLA (8e ed.) Bronvermelding

National Association of Australian State Road Authorities. Guide to the Selection and Testing of Gravel for Pavement Construction. 2nd metric ed. National Association of Australian State Road Authorities, 1974.