APA (7th ed.) Citation

Novotný, L., & Klapper, O. (1957). Filatelia. Osveta.

Chicago Style (17th ed.) Citation

Novotný, Ladislav, and Osvald Klapper. Filatelia. Martin: Osveta, 1957.

MLA (9th ed.) Citation

Novotný, Ladislav, and Osvald Klapper. Filatelia. Osveta, 1957.

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