APA

Harssel J. V., Jackson R. & Hudman L. (2015). National geographic learning's visual geography of travel and tourism. Stamford, CT: National Geographic Learning and Cengage Learing.

Chicago

Harssel Jan Van, Jackson Richard and Hudman Lloyd. 2015. National geographic learning's visual geography of travel and tourism. Stamford, CT: National Geographic Learning and Cengage Learing.

Harvard

Harssel J. V., Jackson R. and Hudman L. (2015). National geographic learning's visual geography of travel and tourism. Stamford, CT: National Geographic Learning and Cengage Learing.

MLA

Harssel Jan Van, Jackson Richard and Hudman Lloyd. National geographic learning's visual geography of travel and tourism. Stamford, CT: National Geographic Learning and Cengage Learing. 2015.