Dyfyniad APA

(2007). Aligning Science Assessment Standards: Texas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program.

Dyfyniad Arddull Chicago

Aligning Science Assessment Standards: Texas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program, 2007.

Dyfyniad MLA

Aligning Science Assessment Standards: Texas & the 2009 National Assessment of Educational Progress. Regional Educational Laboratory Program, 2007.

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