APA (7th ed.) Citation

M. Perpetua, S., Synon, M., & Rankin, K. (1960). These are our horizons (New edition.). Ginn and Company.

Chicago Style (17th ed.) Citation

M. Perpetua, Sister, Mary Synon, and Katherine Rankin. These Are Our Horizons. New edition. Boston: Ginn and Company, 1960.

MLA (8th ed.) Citation

M. Perpetua, Sister, et al. These Are Our Horizons. New edition. Ginn and Company, 1960.