Gaya APA
Land, Geoffrey. (1986).
Business reading .
Harlow:
Longman.
Gaya Chicago
Land, Geoffrey.
Business reading.
Harlow:
Longman,
1986.
Buku.
Gaya MLA
Land, Geoffrey.
Business reading.
Harlow:
Longman,
1986.
Buku.
Gaya Turabian
Land, Geoffrey.
Business reading.
Harlow:
Longman,
1986.
Buku.