Gaya APA
Mansfield, Carmella. (1981).
Writing Business Letter & Reports (1st edition).
USA:
Bobbs-Merrill Company.
Gaya Chicago
Mansfield, Carmella.
Writing Business Letter & Reports.
1st edition
USA:
Bobbs-Merrill Company,
1981.
Buku.
Gaya MLA
Mansfield, Carmella.
Writing Business Letter & Reports.
1st edition
USA:
Bobbs-Merrill Company,
1981.
Buku.
Gaya Turabian
Mansfield, Carmella.
Writing Business Letter & Reports.
1st edition
USA:
Bobbs-Merrill Company,
1981.
Buku.