Cita APA (7th ed.)

SOMERVIL BARBARA. (2019). THE STORY BEHIND RUBBER (2012 Ed.). RAINTREE PUBLISHERS.

Cita Chicago (17th ed.)

SOMERVIL BARBARA. THE STORY BEHIND RUBBER. 2012 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.

Cita MLA (9th ed.)

SOMERVIL BARBARA. THE STORY BEHIND RUBBER. 2012 Ed. RAINTREE PUBLISHERS, 2019.