APA (7th ed.) Citation

Semak, O., Marx, K., & Engels, F. Listy Karola Marxa a Fridricha Engelsa.

Chicago Style (17th ed.) Citation

Semak, Oleg, Karl Marx, and Friedrich Engels. Listy Karola Marxa a Fridricha Engelsa.

MLA (9th ed.) Citation

Semak, Oleg, et al. Listy Karola Marxa a Fridricha Engelsa.

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