APA (7th ed.) Citation

Kátai Imre. (1977). Change of the sum of digits by multiplication.

Chicago Style (17th ed.) Citation

Kátai Imre. Change of the Sum of Digits by Multiplication. 1977.

MLA (8th ed.) Citation

Kátai Imre. Change of the Sum of Digits by Multiplication. 1977.

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