Gaya APA
George, W, S., William, G.
(1972).
Statistical Methods
(
Cet.5)
.
Amerika:
The Iowa State Unversity Press.
Gaya MLA
George, W., Snedecor., William, G.Cochran.
"Statistical Methods".
Cet.5
Amerika:
The Iowa State Unversity Press,
1972.
Text.