(1907). [Letz, Štefan]. s.n.].
Chicago Style (17th ed.) Citation[Letz, Štefan]. [S.l: s.n.], 1907.
MLA (9th ed.) Citation[Letz, Štefan]. s.n.], 1907.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation
