APA (7th ed.) Citation

Macdonald, R., Jarolimek, J., & Davis, B. (1971). One plus one: Learning about communities. Macmillan Co..

Chicago Style (17th ed.) Citation

Macdonald, Ruth, John Jarolimek, and Bertha Davis. One Plus One: Learning About Communities. New York: Macmillan Co., 1971.

MLA (9th ed.) Citation

Macdonald, Ruth, et al. One Plus One: Learning About Communities. Macmillan Co., 1971.