Cita APA (7a ed.)

USDA. Soil Conservation Service. (1967). Soilk survey of ionia county Michigan. [editor no identificado].

Cita Chicago Style (17a ed.)

USDA. Soil Conservation Service. Soilk Survey of Ionia County Michigan. [Lugar de publicación no identificado]: [editor no identificado], 1967.

Cita MLA (8a ed.)

USDA. Soil Conservation Service. Soilk Survey of Ionia County Michigan. [editor no identificado], 1967.