Dyfyniad APA
(1965). Descriptive statistics: A programmed text book. John willey.
Dyfyniad Arddull Chicago
Descriptive Statistics: A Programmed Text Book. New York: John willey, 1965.
Dyfyniad MLA
Descriptive Statistics: A Programmed Text Book. John willey, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.