Gaya APA
Mansfield,Edwin, . (1980).
Statistics for Business and Economics: Methods and Applications (3 ed).
New York:
W.W.Norton and Company .Inc.
Gaya MLA
Mansfield,Edwin, .
"Statistics for Business and Economics: Methods and Applications".
3 ed
New York:
W.W.Norton and Company .Inc,
1980.
Text.