APA (7th ed.) Citation

Esslinger, H. (2013). Keep it simple : the early design years of Apple / Hartmut Esslinger, founder of Frog Design: The early design years of Apple. Arnoldsche Art Publishers.

Chicago Style (17th ed.) Citation

Esslinger, Hartmut. Keep It Simple : The Early Design Years of Apple / Hartmut Esslinger, Founder of Frog Design: The Early Design Years of Apple. Stuttgart: Arnoldsche Art Publishers, 2013.

MLA (9th ed.) Citation

Esslinger, Hartmut. Keep It Simple : The Early Design Years of Apple / Hartmut Esslinger, Founder of Frog Design: The Early Design Years of Apple. Arnoldsche Art Publishers, 2013.

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