APA
Sprague M. A., Triplett G. B., . (1986). No-tillage and surface-tillage agriculture. New York: John Wiley.
Chicago
Sprague Milton A, Triplett Glover B, . 1986. No-tillage and surface-tillage agriculture. New York: John Wiley.
Harvard
Sprague M. A., Triplett G. B., . (1986). No-tillage and surface-tillage agriculture. New York: John Wiley.
MLA
Sprague Milton A, Triplett Glover B, . No-tillage and surface-tillage agriculture. New York: John Wiley. 1986.