Gaya APA
Management of business. (1990).
Singapore:
Mc Graw Hill.
Gaya Chicago
Management of business.
text.
Singapore:
Mc Graw Hill,
1990.
Tesis.
Gaya MLA
Management of business.
text.
Singapore:
Mc Graw Hill,
1990.
Tesis.
Gaya Turabian
Management of business.
Singapore:
Mc Graw Hill,
1990.
Tesis.