Gaya APA
Profit at the bottom of the ladder. (2010).
Boston:
[s.n.].
Gaya Chicago
Profit at the bottom of the ladder.
.
Boston:
[s.n.],
2010.
Text.
Gaya MLA
Profit at the bottom of the ladder.
.
Boston:
[s.n.],
2010.
Text.
Gaya Turabian
Profit at the bottom of the ladder.
Boston:
[s.n.],
2010.
Print.