APA Style

Brett, Michael. (2001). The national parks of America . Hauppauge, NY :: Barron's Educational Series.

Chicago Style

Brett, Michael. The national parks of America. Hauppauge, NY :: Barron's Educational Series, 2001. print.

MLA Style

Brett, Michael. The national parks of America. Hauppauge, NY :: Barron's Educational Series, 2001. print.

Turabian Style

Brett, Michael. The national parks of America. Hauppauge, NY :: Barron's Educational Series, 2001. print.