APA (7th ed.) Citation

Akin, W. E. (1968). The North Central United States. Van Nostrand.

Chicago Style (17th ed.) Citation

Akin, Wallace E. The North Central United States. Princeton, NJ [u.a.]: Van Nostrand, 1968.

MLA (9th ed.) Citation

Akin, Wallace E. The North Central United States. Van Nostrand, 1968.