Colwill, D. M., Thompson, J. R., & Rutter, A. J. (1982). An assessment of the conditions for shrubs alongside motorways. Transport and Road Research Laboratory.
Chicago-viite (17. p.)Colwill, D. M., J. R. Thompson, ja A. J. Rutter. An Assessment of the Conditions for Shrubs Alongside Motorways. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1982.
MLA-viite (9. p.)Colwill, D. M., et al. An Assessment of the Conditions for Shrubs Alongside Motorways. Transport and Road Research Laboratory, 1982.
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