Gaya APA

Downs, Roger M.. (2005). Almanac of Geography . Washington: National Geographic.

Gaya Chicago

Downs, Roger M.. Almanac of Geography. Washington: National Geographic, 2005. Reference.

Gaya MLA

Downs, Roger M.. Almanac of Geography. Washington: National Geographic, 2005. Reference.

Gaya Turabian

Downs, Roger M.. Almanac of Geography. Washington: National Geographic, 2005. Reference.