Cita APA (7th ed.)
Singer, M. J., & Munns, D. N. (1987). Soils: An introduction. Macmillan.
Cita Chicago (17th ed.)
Singer, Michael J., i Donald N. Munns. Soils: An Introduction. New York: Macmillan, 1987.
Cita MLA (9th ed.)
Singer, Michael J., i Donald N. Munns. Soils: An Introduction. Macmillan, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.