Authentication Score 3
Original Citation
Keller, Helen. Optimism. T. Y. Crowell and Company, 1903, pt. 2.
Current Citation
Keller, Helen. "Optimism." The World I Live In and Optimism: A Collection of Essays. Dover Publications, 2010, pt. 2.
Keller, Helen. Optimism. T. Y. Crowell and Company, 1903, pt. 2.
Keller, Helen. "Optimism." The World I Live In and Optimism: A Collection of Essays. Dover Publications, 2010, pt. 2.