توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Nudds, R., Taylor, G., & Thomas, A. (2004). Tuning of Strouhal number for high propulsive efficiency accurately predicts how wingbeat frequency and stroke amplitude relate and scale with size and flight speed in birds.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Nudds, R., G. Taylor, و A. Thomas. Tuning of Strouhal Number for High Propulsive Efficiency Accurately Predicts How Wingbeat Frequency and Stroke Amplitude Relate and Scale with Size and Flight Speed in Birds. 2004.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Nudds, R., et al. Tuning of Strouhal Number for High Propulsive Efficiency Accurately Predicts How Wingbeat Frequency and Stroke Amplitude Relate and Scale with Size and Flight Speed in Birds. 2004.