APA

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

Chicago

Cross Wilbur, Florio Carol and Academy for educational development. 1978. You are never too old to learn. New York: McGraw-Hill.

Harvard

Cross W., Florio C. and Academy for educational development. (1978). You are never too old to learn. New York: McGraw-Hill.

MLA

Cross Wilbur, Florio Carol and Academy for educational development. You are never too old to learn. New York: McGraw-Hill. 1978.