APA

Ribbens H., Brafman Bahar G., . (1981). Proposed warrants for South African mid-block pedestrian crossings. Pretoria: National Institute for Transport and Road Research. Technical report RF/2/81.

Chicago

Ribbens H, Brafman Bahar G, . 1981. Proposed warrants for South African mid-block pedestrian crossings. Pretoria: National Institute for Transport and Road Research. Technical report RF/2/81.

Harvard

Ribbens H., Brafman Bahar G., . (1981). Proposed warrants for South African mid-block pedestrian crossings. Pretoria: National Institute for Transport and Road Research. Technical report RF/2/81.

MLA

Ribbens H, Brafman Bahar G, . Proposed warrants for South African mid-block pedestrian crossings. Pretoria: National Institute for Transport and Road Research. Technical report RF/2/81. 1981.