Singh, A. (1980). Evaluation of the final draft of the 'children and traffic series' of teachers' guides. Transport and Road Research Laboratory.
Lua i Stíl Chicago (17ú heag.)Singh, Amarjit. Evaluation of the Final Draft of the 'Children and Traffic Series' of Teachers' Guides. Crowthorne, Berk: Transport and Road Research Laboratory, 1980.
Lua MLA (9ú heag.)Singh, Amarjit. Evaluation of the Final Draft of the 'Children and Traffic Series' of Teachers' Guides. Transport and Road Research Laboratory, 1980.
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