APA
(1952). Type descriptions and packing specifications for natural rubber. New York: Rubber manufacturers association.
Chicago
1952. Type descriptions and packing specifications for natural rubber. New York: Rubber manufacturers association.
Harvard
(1952). Type descriptions and packing specifications for natural rubber. New York: Rubber manufacturers association.
MLA
Type descriptions and packing specifications for natural rubber. New York: Rubber manufacturers association. 1952.