APA (7th ed.) Citation

Németh László. (2015). A geometrical proof of sum of cos nϕ.

Chicago Style (17th ed.) Citation

Németh László. A Geometrical Proof of Sum of Cos Nϕ. 2015.

MLA (8th ed.) Citation

Németh László. A Geometrical Proof of Sum of Cos Nϕ. 2015.

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