Gaya APA
Alfred, A.M. (et al). (1968).
Business economics .
London:
Macmillan.
Gaya Chicago
Alfred, A.M. (et al).
Business economics.
London:
Macmillan,
1968.
.
Gaya MLA
Alfred, A.M. (et al).
Business economics.
London:
Macmillan,
1968.
.
Gaya Turabian
Alfred, A.M. (et al).
Business economics.
London:
Macmillan,
1968.
.