Dyfyniad APA

Gene R Sellers & Stephen A Vardeman. (1977). Elementary statistics (2.). Philadelphia.

Dyfyniad Arddull Chicago

Gene R Sellers and Stephen A Vardeman. Elementary Statistics. 2. Philadelphia, 1977.

Dyfyniad MLA

Gene R Sellers and Stephen A Vardeman. Elementary Statistics. 2. Philadelphia, 1977.

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