Dyfyniad APA

Kanis, I. B., & Yasso, W. E. (1996). Earth science activities: A guide to effective elementary school science teaching. Allyn and Bacon.

Dyfyniad Arddull Chicago

Kanis, Ira B., and Warren E. Yasso. Earth Science Activities: A Guide to Effective Elementary School Science Teaching. Boston: Allyn and Bacon, 1996.

Dyfyniad MLA

Kanis, Ira B., and Warren E. Yasso. Earth Science Activities: A Guide to Effective Elementary School Science Teaching. Allyn and Bacon, 1996.

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