توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Nurk, E., Refsum, H., Drevon, C., Tell, G., Nygaard, H., Engedal, K., & Smith, A. (2010). Cognitive performance among the elderly in relation to the intake of plant foods. The Hordaland Health Study.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Nurk, E., H. Refsum, C. Drevon, G. Tell, H. Nygaard, K. Engedal, و A. Smith. Cognitive Performance Among the Elderly in Relation to the Intake of Plant Foods. The Hordaland Health Study. 2010.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Nurk, E., et al. Cognitive Performance Among the Elderly in Relation to the Intake of Plant Foods. The Hordaland Health Study. 2010.