APA

National Association of Australian State Road, Authorities, . (1986). Roundabouts. Milsons Point, NSW: National Association of Australian State Road.

Chicago

National Association of Australian State Road, Authorities, . 1986. Roundabouts. Milsons Point, NSW: National Association of Australian State Road.

Harvard

National Association of Australian State Road, Authorities, . (1986). Roundabouts. Milsons Point, NSW: National Association of Australian State Road.

MLA

National Association of Australian State Road, Authorities, . Roundabouts. Milsons Point, NSW: National Association of Australian State Road. 1986.