Gaya APA
Management and Marketing 2012. (2012).
Singapura:
Mc Graw Hill.
Gaya Chicago
Management and Marketing 2012.
.
Singapura:
Mc Graw Hill,
2012.
Buku.
Gaya MLA
Management and Marketing 2012.
.
Singapura:
Mc Graw Hill,
2012.
Buku.
Gaya Turabian
Management and Marketing 2012.
Singapura:
Mc Graw Hill,
2012.
Buku.