APA

Roy (M M), . (1998). Principles Of Soil Science Ed.3. : .

Chicago

Roy (M M), . 1998. Principles Of Soil Science Ed.3. : .

Harvard

Roy (M M), . (1998). Principles Of Soil Science Ed.3. : .

MLA

Roy (M M), . Principles Of Soil Science Ed.3. : . 1998.