APA (7th ed.) Citation

Barrows, H. H., & Putnam Parker, E. United States and Canada.

Chicago Style (17th ed.) Citation

Barrows, Harlan H., and Edith Putnam Parker. United States and Canada.

MLA (8th ed.) Citation

Barrows, Harlan H., and Edith Putnam Parker. United States and Canada.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.