APA (7th ed.) Citation

McLellan, D. (1978). Friedrich Engels. Penguin Books.

Chicago Style (17th ed.) Citation

McLellan, David. Friedrich Engels. Harmondsworth: Penguin Books, 1978.

MLA (9th ed.) Citation

McLellan, David. Friedrich Engels. Penguin Books, 1978.

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