APA (7th ed.) Citation

Wiedemann, J., & Portillo, M. d. M. Web design E-commerce. Taschen.

Chicago Style (17th ed.) Citation

Wiedemann, Julius, and María del Mar Portillo. Web Design E-commerce. Italia: Taschen.

MLA (9th ed.) Citation

Wiedemann, Julius, and María del Mar Portillo. Web Design E-commerce. Taschen.

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