Gaya APA
Carter, Vernon Gill. (1974).
Topsoil and civilization .
United States of America:
University of Oklahoma Press.
Gaya Chicago
Carter, Vernon Gill.
Topsoil and civilization.
United States of America:
University of Oklahoma Press,
1974.
Text.
Gaya MLA
Carter, Vernon Gill.
Topsoil and civilization.
United States of America:
University of Oklahoma Press,
1974.
Text.
Gaya Turabian
Carter, Vernon Gill.
Topsoil and civilization.
United States of America:
University of Oklahoma Press,
1974.
Print.