APA (7th ed.) Citation

Helenius, I. J. (1998). Allergy and asthma in elite athletes.

Chicago Style (17th ed.) Citation

Helenius, Ilkka J. Allergy and Asthma in Elite Athletes. 1998.

MLA (9th ed.) Citation

Helenius, Ilkka J. Allergy and Asthma in Elite Athletes. 1998.

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