Gaya APA
freund, J, E., perles, B, M. (1993).
Elementary Business Statistics :the modern approach (8th ed).
America:
Prentice-Hall.
Gaya MLA
freund, John, E.., perles, Benjamin, M..
"Elementary Business Statistics :the modern approach".
8th ed
America:
Prentice-Hall,
1993.
Text.