Cita APA (7th ed.)
Thomas, D. (1997). Soil and water conservation manual for kenya. Soil and water conservation branch.
Cita Chicago (17th ed.)
Thomas, D.B. Soil and Water Conservation Manual for Kenya. Nairobi, Kenya: Soil and water conservation branch, 1997.
Cita MLA (9th ed.)
Thomas, D.B. Soil and Water Conservation Manual for Kenya. Soil and water conservation branch, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.