APA (7th ed.) Citation

Bull, E., & Schreiner, E. (1948). Karl Marx.

Chicago Style (17th ed.) Citation

Bull, Edvard, and Erling Schreiner. Karl Marx. 1948.

MLA (8th ed.) Citation

Bull, Edvard, and Erling Schreiner. Karl Marx. 1948.

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