APA ציטוט

Cross, W., & Florio, C. (1978). You are never too old to learn. New York: McGraw-Hill.

Chicago Style Citation

Cross, Wilbur., and Carol Florio. You Are Never Too Old to Learn. New York: McGraw-Hill, 1978.

ציטוט MLA

Cross, Wilbur., and Carol Florio. You Are Never Too Old to Learn. New York: McGraw-Hill, 1978.