Dyfyniad APA

National Science Teachers Association & Gabel, D. (1994). Handbook of research on science teaching and learning. Macmillan.

Dyfyniad Arddull Chicago

National Science Teachers Association and Dorothy Gabel. Handbook of Research on Science Teaching and Learning. New York: Macmillan, 1994.

Dyfyniad MLA

National Science Teachers Association and Dorothy Gabel. Handbook of Research on Science Teaching and Learning. Macmillan, 1994.

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