APA (7th ed.) Citation

Fischer, Bostock, & Marek. (1973). Marx in his own words. Penguin.

Chicago Style (17th ed.) Citation

Fischer, Bostock, and Marek. Marx in His Own Words. Harmondsworth: Penguin, 1973.

MLA (8th ed.) Citation

Fischer, et al. Marx in His Own Words. Penguin, 1973.