APA (7th ed.) Citation

Umnov, E. I. (1961). E.I. Umnow. Schachkompositionen.

Chicago Style (17th ed.) Citation

Umnov, E. I. E.I. Umnow. Schachkompositionen. 1961.

MLA (9th ed.) Citation

Umnov, E. I. E.I. Umnow. Schachkompositionen. 1961.

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