APA (7th ed.) Citation

Mattern, J. (1942). Geopolitik: Doctrine of national selfsufficiency and empire. Johns Hopkins Press.

Chicago Style (17th ed.) Citation

Mattern, Johannes. Geopolitik: Doctrine of National Selfsufficiency and Empire. Baltimore: Johns Hopkins Press, 1942.

MLA (9th ed.) Citation

Mattern, Johannes. Geopolitik: Doctrine of National Selfsufficiency and Empire. Johns Hopkins Press, 1942.

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