APA (7th ed.) Citation

Boyer, R. E., & Higgins, J. L. Activites and demonstrations for earth science.

Chicago Style (17th ed.) Citation

Boyer, Robert E., and Jon L. Higgins. Activites and Demonstrations for Earth Science. New York : Parker, c1970.

MLA (9th ed.) Citation

Boyer, Robert E., and Jon L. Higgins. Activites and Demonstrations for Earth Science.