APA (7th ed.) Citation

-. (1976). Investigating the Earth: - (1.). Houghton Mifflin company.

Chicago Style (17th ed.) Citation

-. Investigating the Earth: -. 1. Boston: Houghton Mifflin company, 1976.

MLA (9th ed.) Citation

-. Investigating the Earth: -. 1. Houghton Mifflin company, 1976.

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