Không rõ. (2001). Job Descriptions, Specifications, andStandards. Youth PublishingHouse.
Chicago Style CitationKhông rõ. Job Descriptions, Specifications, AndStandards. Youth PublishingHouse, 2001.
Cita MLAKhông rõ. Job Descriptions, Specifications, AndStandards. Youth PublishingHouse, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.