APA (7th ed.) Citation

Engels, F., & Henderson, W. O. (1967). Selected writings. Penguin.

Chicago Style (17th ed.) Citation

Engels, Friedrich, and W. O. Henderson. Selected Writings. Harmondsworth: Penguin, 1967.

MLA (9th ed.) Citation

Engels, Friedrich, and W. O. Henderson. Selected Writings. Penguin, 1967.