APA (7th ed.) Citation

Frei, G., & Warhol, A. (1999). Hammer and sickle. Thomas Ammannn Fine Art.

Chicago Style (17th ed.) Citation

Frei, Georg, and Andy Warhol. Hammer and Sickle. Zurich: Thomas Ammannn Fine Art, 1999.

MLA (9th ed.) Citation

Frei, Georg, and Andy Warhol. Hammer and Sickle. Thomas Ammannn Fine Art, 1999.

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