APA

Krämer U., Link E., Oppermann H., Ranft U., Schäfer T., Thriene B., Behrendt H. & Ring J. (20030417). [Studying school beginners in western and eastern Germany: allergy trends and sensitisations 1991-2000]. : Gesundheitswesen (Bundesverband der Arzte des Offentlichen Gesundheitsdienstes (Germany)).

Chicago

Krämer U, Link E, Oppermann H, Ranft U, Schäfer T, Thriene B, Behrendt H and Ring J. 20030417. [Studying school beginners in western and eastern Germany: allergy trends and sensitisations 1991-2000]. : Gesundheitswesen (Bundesverband der Arzte des Offentlichen Gesundheitsdienstes (Germany)).

Harvard

Krämer U., Link E., Oppermann H., Ranft U., Schäfer T., Thriene B., Behrendt H. and Ring J. (20030417). [Studying school beginners in western and eastern Germany: allergy trends and sensitisations 1991-2000]. : Gesundheitswesen (Bundesverband der Arzte des Offentlichen Gesundheitsdienstes (Germany)).

MLA

Krämer U, Link E, Oppermann H, Ranft U, Schäfer T, Thriene B, Behrendt H and Ring J. [Studying school beginners in western and eastern Germany: allergy trends and sensitisations 1991-2000]. : Gesundheitswesen (Bundesverband der Arzte des Offentlichen Gesundheitsdienstes (Germany)). 20030417.