Cita APA (7a ed.)

Engelstad, O. (1985). Fertilizer technology and use (3rd edition.). SSSA.

Cita Chicago Style (17a ed.)

Engelstad, O.P. Fertilizer Technology and Use. 3rd edition. Wisconsin: SSSA, 1985.

Cita MLA (8a ed.)

Engelstad, O.P. Fertilizer Technology and Use. 3rd edition. SSSA, 1985.