International Labor Office, Geneva. (1924). Studies and reports, series I (Professional workers) no.1. s.n.
Cita Chicago Style (17a ed.)International Labor Office, Geneva. Studies and Reports, Series I (Professional Workers) No.1. Geneva: s.n, 1924.
Cita MLA (9a ed.)International Labor Office, Geneva. Studies and Reports, Series I (Professional Workers) No.1. s.n, 1924.
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