Dyfyniad APA

Christensen,Howard B. (1977). Statistics step by step. Houghton Mifflin.

Dyfyniad Arddull Chicago

Christensen,Howard B. Statistics Step by Step. Atlanta: Houghton Mifflin, 1977.

Dyfyniad MLA

Christensen,Howard B. Statistics Step by Step. Houghton Mifflin, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.