APA Citation

Horn,Sam. (1991). Concentration!: How to focus for success. Los Altos, California: Crisp Publications.

Chicago Style Citation

Horn,Sam. Concentration!: How to Focus for Success. Los Altos, California: Crisp Publications, 1991.

MLA Citation

Horn,Sam. Concentration!: How to Focus for Success. Los Altos, California: Crisp Publications, 1991.

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