Riechel, R. (1989). Personnel needs and changing reference service. Library Professional Publications.
Chicago-viite (17. p.)Riechel, Rosemarie. Personnel Needs and Changing Reference Service. Hamden, Conn.: Library Professional Publications, 1989.
MLA-viite (8. p.)Riechel, Rosemarie. Personnel Needs and Changing Reference Service. Library Professional Publications, 1989.
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