HALL, L. (1969). Company Secretarial Practise L. Hall. Macdonal & Evans Ltd.
Lua i Stíl Chicago (17ú heag.)HALL, L. Company Secretarial Practise L. Hall. Macdonal & Evans Ltd, 1969.
Lua MLA (8ú heag.)HALL, L. Company Secretarial Practise L. Hall. Macdonal & Evans Ltd, 1969.
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