APA-viite (7. p.)

University of the Philippines (Los Banos). College of Agriculture & Department of Soils. A laboratory manual in soil science. s.n.

Chicago-viite (17. p.)

University of the Philippines (Los Banos). College of Agriculture ja Department of Soils. A Laboratory Manual in Soil Science. [Los Banos, Laguna: s.n.

MLA-viite (9. p.)

University of the Philippines (Los Banos). College of Agriculture ja Department of Soils. A Laboratory Manual in Soil Science. s.n.

Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.