توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Tunbridge, E., Harrison, P., Warden, D., Refsum, H., Johnston, C., & Smith, D. (2007). Human plasma homocysteine levels are associated with the catechol-O-methyltransferase Val158Met polymorphism.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Tunbridge, E., P. Harrison, D. Warden, H. Refsum, C. Johnston, و D. Smith. Human Plasma Homocysteine Levels Are Associated with the Catechol-O-methyltransferase Val158Met Polymorphism. 2007.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Tunbridge, E., et al. Human Plasma Homocysteine Levels Are Associated with the Catechol-O-methyltransferase Val158Met Polymorphism. 2007.