APA (7th ed.) Citation

Merriam, C. H. (1898). Life zones and crop zones of the United States. [publisher not identified].

Chicago Style (17th ed.) Citation

Merriam, C. Hart. Life Zones and Crop Zones of the United States. [Place of publication not identified]: [publisher not identified], 1898.

MLA (9th ed.) Citation

Merriam, C. Hart. Life Zones and Crop Zones of the United States. [publisher not identified], 1898.

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