APA

Singh A., . (1980). Evaluation of the final draft of the 'children and traffic series' of teachers' guides. Crowthorne: Transport and Road Research Laboratory. Supplementary report no 556.

Chicago

Singh A, . 1980. Evaluation of the final draft of the 'children and traffic series' of teachers' guides. Crowthorne: Transport and Road Research Laboratory. Supplementary report no 556.

Harvard

Singh A., . (1980). Evaluation of the final draft of the 'children and traffic series' of teachers' guides. Crowthorne: Transport and Road Research Laboratory. Supplementary report no 556.

MLA

Singh A, . Evaluation of the final draft of the 'children and traffic series' of teachers' guides. Crowthorne: Transport and Road Research Laboratory. Supplementary report no 556. 1980.