APA-referens (7:e uppl.)

Schjonning, P., Elmholt, S., & Christensen, B. T. (2004). Managing soil quality: Challenges in modern agriculture (1a. ed.). CABI.

Chicago-referens (17:e uppl.)

Schjonning, Per, Susanne Elmholt, och Bent Tolstrup Christensen. Managing Soil Quality: Challenges in Modern Agriculture. 1a. ed. Wallingford: CABI, 2004.

MLA-referens (9:e uppl.)

Schjonning, Per, et al. Managing Soil Quality: Challenges in Modern Agriculture. 1a. ed. CABI, 2004.