Gaya APA

Buol,S.W, . et al (1974). Histosols: Their Characteristic Clasification And Use . USA: The Soil Science Society Of America,Inc.

Gaya MLA

Buol,S.W, . et al. "Histosols: Their Characteristic Clasification And Use". USA: The Soil Science Society Of America,Inc, 1974. Text.