Gaya APA
Cowell, Donald. (1984).
The Marketing of Services .
London:
Heinemann.
Gaya Chicago
Cowell, Donald.
The Marketing of Services.
London:
Heinemann,
1984.
Buku Teks.
Gaya MLA
Cowell, Donald.
The Marketing of Services.
London:
Heinemann,
1984.
Buku Teks.
Gaya Turabian
Cowell, Donald.
The Marketing of Services.
London:
Heinemann,
1984.
Buku Teks.