APA Citation

HORN, S. (1991). Concentration!: How to focus for success. California: Crisp Publications, Inc..

Chicago Style Citation

HORN, Sam. Concentration!: How to Focus for Success. California: Crisp Publications, Inc., 1991.

MLA Citation

HORN, Sam. Concentration!: How to Focus for Success. California: Crisp Publications, Inc., 1991.

Warning: These citations may not always be 100% accurate.