APA استشهاد

Steffen, K., Andersen, T. E., & Bahr, R. (2007). Risk of injury on artificial turf and natural grass in young female football players. BMJ Group.

استشهاد بنمط شيكاغو

Steffen, Kathrin, Thor Einar Andersen, و Roald Bahr. Risk of Injury On Artificial Turf and Natural Grass in Young Female Football Players. BMJ Group, 2007.

MLA استشهاد

Steffen, Kathrin, Thor Einar Andersen, و Roald Bahr. Risk of Injury On Artificial Turf and Natural Grass in Young Female Football Players. BMJ Group, 2007.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.