APA (7th ed.) Citation

Print based on a photo of Marx in London. Original photo by John Mayall, London. Compare BG A9/369.

Chicago Style (17th ed.) Citation

Print Based on a Photo of Marx in London. Original Photo by John Mayall, London. Compare BG A9/369.

MLA (8th ed.) Citation

Print Based on a Photo of Marx in London. Original Photo by John Mayall, London. Compare BG A9/369.

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