Dyfyniad APA

Stone, A. H., & Sherman, L. R. (1975). Spaceship earth: Life science. Teacher's ed (Teacher's ed.). Houghton Mifflin Company.

Dyfyniad Arddull Chicago

Stone, A. Harris, and Lloyd R. Sherman. Spaceship Earth: Life Science. Teacher's Ed. Teacher's ed. Boston: Houghton Mifflin Company, 1975.

Dyfyniad MLA

Stone, A. Harris, and Lloyd R. Sherman. Spaceship Earth: Life Science. Teacher's Ed. Teacher's ed. Houghton Mifflin Company, 1975.

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