APA (7th ed.) Citation

Protopopov, S. (1940). [Detva]. [Slovakotour?].

Chicago Style (17th ed.) Citation

Protopopov, Sergej. [Detva]. [Bratislava?]: [Slovakotour?], 1940.

MLA (9th ed.) Citation

Protopopov, Sergej. [Detva]. [Slovakotour?], 1940.

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