Dyfyniad APA

Earth Science Curriculum Project. (1965). Investigating the earth: Teacher's guide (rev. 1965.). Johnson Publishing.

Dyfyniad Arddull Chicago

Earth Science Curriculum Project. Investigating the Earth: Teacher's Guide. rev. 1965. Colorado, BO: Johnson Publishing, 1965.

Dyfyniad MLA

Earth Science Curriculum Project. Investigating the Earth: Teacher's Guide. rev. 1965. Johnson Publishing, 1965.

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