APA (7th ed.) Citation

Sagan, d. (1989). biospheres: Metamorphosis of planet earth. McGraw-Hill.

Chicago Style (17th ed.) Citation

Sagan, dorion. Biospheres: Metamorphosis of Planet Earth. McGraw-Hill, 1989.

MLA (8th ed.) Citation

Sagan, dorion. Biospheres: Metamorphosis of Planet Earth. McGraw-Hill, 1989.

Warning: These citations may not always be 100% accurate.