APA (7th ed.) Citation

Feng, G. (2021). He’s frequency formula to fractal undamped Duffing equation. SAGE Publishing.

Chicago Style (17th ed.) Citation

Feng, Guang-Qing. He’s Frequency Formula to Fractal Undamped Duffing Equation. SAGE Publishing, 2021.

MLA (8th ed.) Citation

Feng, Guang-Qing. He’s Frequency Formula to Fractal Undamped Duffing Equation. SAGE Publishing, 2021.

Warning: These citations may not always be 100% accurate.