APA (7th ed.) Citation

Early, M., Cooper, K. E., Santeusanio, N., & Adell, M. (1970). Widening Circles. America.

Chicago Style (17th ed.) Citation

Early, Margaret, K. Elizabeth Cooper, Nancy Santeusanio, and Marian Adell. Widening Circles. America, 1970.

MLA (9th ed.) Citation

Early, Margaret, et al. Widening Circles. America, 1970.