APA
Ramanna T. R. ., Ajay Kumar D. . & Krishnamurthy S. . (1986). Soil sampling and testing. Chandigarh: Technical Teacher Training Institute.
Chicago
Ramanna T R, Ajay Kumar Duggal and Krishnamurthy S. 1986. Soil sampling and testing. Chandigarh: Technical Teacher Training Institute.
Harvard
Ramanna T. R. ., Ajay Kumar D. . and Krishnamurthy S. . (1986). Soil sampling and testing. Chandigarh: Technical Teacher Training Institute.
MLA
Ramanna T R, Ajay Kumar Duggal and Krishnamurthy S. Soil sampling and testing. Chandigarh: Technical Teacher Training Institute. 1986.