Gaya APA
Mohler, C, L., Johnson, S, E. (2009).
Crop Rotation On Organic Farms: A Planning Manual .
New York:
Natural Resource, Agriculture, and Engineering Service (NRAES).
Gaya MLA
Mohler, Charles, L.., Johnson, Sue, Ellen.
"Crop Rotation On Organic Farms: A Planning Manual".
New York:
Natural Resource, Agriculture, and Engineering Service (NRAES),
2009.
e-book.