APA (7th ed.) Citation

Collins, B. J., & Collins, L. (1967). The story of our earth. California State Dept of Education.

Chicago Style (17th ed.) Citation

Collins, Barbara J., and Lorence Collins. The Story of Our Earth. Sacramento: California State Dept of Education, 1967.

MLA (9th ed.) Citation

Collins, Barbara J., and Lorence Collins. The Story of Our Earth. California State Dept of Education, 1967.