Gaya APA
Thirkettle, G.L.. (1981).
Wheldon's business statistics and statistical method (9th ed).
London:
ELBS.
Gaya Chicago
Thirkettle, G.L..
Wheldon's business statistics and statistical method.
9th ed
London:
ELBS,
1981.
Text.
Gaya MLA
Thirkettle, G.L..
Wheldon's business statistics and statistical method.
9th ed
London:
ELBS,
1981.
Text.
Gaya Turabian
Thirkettle, G.L..
Wheldon's business statistics and statistical method.
9th ed
London:
ELBS,
1981.
Print.