Gaya APA
Buckman, H, O., Brady, N, C. (1969).
The Nature and Properties of Soils (Edisi Ketujuh).
Canada:
THE MACMILLAN COMPANY.
Gaya MLA
Buckman, Harry, O., Brady, Nyle, C.
"The Nature and Properties of Soils".
Edisi Ketujuh
Canada:
THE MACMILLAN COMPANY,
1969.
Text.