Gretton, J. (1987). Transport UK 1987: An economic, social and policy andit. Policy Journals.
Chicago-viite (17. p.)Gretton, John. Transport UK 1987: An Economic, Social and Policy Andit. Berkshire: Policy Journals, 1987.
MLA-viite (9. p.)Gretton, John. Transport UK 1987: An Economic, Social and Policy Andit. Policy Journals, 1987.
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