Gaya APA

SANCHEZ, P, A. (1976). PROPERTIES AND MANAGEMANT OF SOILS IN THE TROPICS . United States of America: Library of Congress Cataloging in Publication Data.

Gaya MLA

SANCHEZ, PEDRO, A.. "PROPERTIES AND MANAGEMANT OF SOILS IN THE TROPICS". United States of America: Library of Congress Cataloging in Publication Data, 1976. Text.