International Labor Office, Berthelot, M, International Labor Office, International Labor Office, International Labor Office, International Labor Office, . . . Lazard, M. (1975). Coal production in the Ruhr district (end of May 1920): Enquiry by the International Labour Office. Nendehln, Kraus Reprint.
Chicago Style (17th ed.) CitationInternational Labor Office, et al. Coal Production in the Ruhr District (end of May 1920): Enquiry by the International Labour Office. [Geneva]: Nendehln, Kraus Reprint, 1975.
MLA (9th ed.) CitationInternational Labor Office, et al. Coal Production in the Ruhr District (end of May 1920): Enquiry by the International Labour Office. Nendehln, Kraus Reprint, 1975.
Warning: These citations may not always be 100% accurate.