APA Citation

Giudici, V., & Sergio. (1999). The 20th century. Hauppauge, NY: Barron's.

Chicago Style Citation

Giudici, Vittorio, and Sergio. The 20th Century. Hauppauge, NY: Barron's, 1999.

MLA Citation

Giudici, Vittorio, and Sergio. The 20th Century. Hauppauge, NY: Barron's, 1999.

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