APA

In Leip, D. (1999). Dave Leip's atlas of the U.S. presidential elections. Massachusetts: Dave Leip.

MLA

Leip, Dave. Dave Leip's Atlas of the U.s. Presidential Elections. Massachusetts: Dave Leip, 1999. Internet resource.

CHICAGO

Leip, Dave. 1999. Dave Leip's atlas of the U.S. presidential elections. [Massachusetts]: Dave Leip. http://uselectionatlas.org.

HARVARD

LEIP, D. (1999). Dave Leip's atlas of the U.S. presidential elections. [Massachusetts], Dave Leip. http://uselectionatlas.org.

TURABIAN

Leip, Dave. Dave Leip's Atlas of the U.S. Presidential Elections. [Massachusetts]: Dave Leip, 1999. <http://uselectionatlas.org>.