Dyfyniad APA

National Science Teachers Association & US Dept. of Energy. (1977). Community workers and the energy they use: Grade 2. The Office.

Dyfyniad Arddull Chicago

National Science Teachers Association and US Dept. of Energy. Community Workers and the Energy They Use: Grade 2. Washington: The Office, 1977.

Dyfyniad MLA

National Science Teachers Association and US Dept. of Energy. Community Workers and the Energy They Use: Grade 2. The Office, 1977.

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