Gaya APA
People at Work. (1993).
New York:
Thomson Learning.
Gaya Chicago
People at Work.
1.
New York:
Thomson Learning,
1993.
Buku.
Gaya MLA
People at Work.
1.
New York:
Thomson Learning,
1993.
Buku.
Gaya Turabian
People at Work.
New York:
Thomson Learning,
1993.
Buku.