Không rõ. (2001). Job Descriptions, Specifications, andStandards. Youth PublishingHouse.
Trích dẫn kiểu ChicagoKhông rõ. Job Descriptions, Specifications, AndStandards. Youth PublishingHouse, 2001.
ציטוט MLAKhông rõ. Job Descriptions, Specifications, AndStandards. Youth PublishingHouse, 2001.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.