Gaya APA
Cooper, Donald R.. (2003).
Business research methods .
Boston:
Mc Graw Hill.
Gaya Chicago
Cooper, Donald R..
Business research methods.
Boston:
Mc Graw Hill,
2003.
Tesis.
Gaya MLA
Cooper, Donald R..
Business research methods.
Boston:
Mc Graw Hill,
2003.
Tesis.
Gaya Turabian
Cooper, Donald R..
Business research methods.
Boston:
Mc Graw Hill,
2003.
Tesis.