Gaya APA
Summers, George W.. (1981).
Basic statistic in business and economics (4th. ed).
:
Wadsworth.
Gaya Chicago
Summers, George W..
Basic statistic in business and economics.
4th. ed
:
Wadsworth,
1981.
Text.
Gaya MLA
Summers, George W..
Basic statistic in business and economics.
4th. ed
:
Wadsworth,
1981.
Text.
Gaya Turabian
Summers, George W..
Basic statistic in business and economics.
4th. ed
:
Wadsworth,
1981.
Print.