APA استشهاد

Warren, S., & Warren, K. G. (2001). Multiple sclerosis. World Health Organisation.

استشهاد بنمط شيكاغو

Warren, Sharon, و Kenneth G. Warren. Multiple Sclerosis. Geneva: World Health Organisation, 2001.

MLA استشهاد

Warren, Sharon, و Kenneth G. Warren. Multiple Sclerosis. World Health Organisation, 2001.