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REFERENCES
Bratawidjaja, Thomas Wiyasa. (1994). Sekertaris Profesional. Jakarta: Binaman Library Pressiondo.
Daniels, Diane and Barron, Ann. (1995).Sekretaris Profesional Jakarta: Pt Erlangga.
Sutarto, 1997, Sekretaris dan Tata Warkat. Gajahmada University Press, Yogyakarta.
Yatimah, Durotul. (2009). Kesekertarisan Modern dan Administrasi Perkantoran. Bandung: PT Library Loyal
https://books.google.co.id/books?id=F_5Th5XQf-AC&pg=PA28&lpg=PA28&dq=Sutarto,1997,+Sekretaris+dan+Tata+Warkat.+Ga djah+Mada+University+Press,+Yogyakarta. Taken on 3 february 2015