APA (7th ed.) Citation

Halverson, L. H. Geography via pictures. National Council for Geographic Education.

Chicago Style (17th ed.) Citation

Halverson, Lynn H. Geography via Pictures. Norman, OK: National Council for Geographic Education.

MLA (9th ed.) Citation

Halverson, Lynn H. Geography via Pictures. National Council for Geographic Education.

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