Gaya APA
Bolt, G., Bruggenwert, M. (1978).
Soil Chemistry a. Basic Elements .
Amsterdam:
ELSEVIER SCIENTIFIC PUBLISHING COMPANY.
Gaya MLA
Bolt, G.H.., Bruggenwert, M.G.M.
"Soil Chemistry a. Basic Elements".
Amsterdam:
ELSEVIER SCIENTIFIC PUBLISHING COMPANY,
1978.
Text.