Tohutoro APA (7th ed.)

Orlov, D. (1985). Humus acids of soils.: D.S. Orlov. OxonianPr..

Tohutoru Kātū Chicago (17th ed.)

Orlov, D.S. Humus Acids of Soils.: D.S. Orlov. New Delhi: OxonianPr., 1985.

Tohutoro MLA (9th ed.)

Orlov, D.S. Humus Acids of Soils.: D.S. Orlov. OxonianPr., 1985.