APA

Downing A., Sayer I., . (1982). Preliminary study of children's road-crossing knowledge in three developing countries. Crowthorne: Transport and Road Research Laboratory. Supplementary Report 771.

Chicago

Downing AJ, Sayer IA, . 1982. Preliminary study of children's road-crossing knowledge in three developing countries. Crowthorne: Transport and Road Research Laboratory. Supplementary Report 771.

Harvard

Downing A., Sayer I., . (1982). Preliminary study of children's road-crossing knowledge in three developing countries. Crowthorne: Transport and Road Research Laboratory. Supplementary Report 771.

MLA

Downing AJ, Sayer IA, . Preliminary study of children's road-crossing knowledge in three developing countries. Crowthorne: Transport and Road Research Laboratory. Supplementary Report 771. 1982.