Cita APA (7th ed.)

MASON PAUL. (2019). WORLD IN PERILGRASSLANDS UNDER THREAT (2009 Ed.). HEINEMANN LIBRARY.

Cita Chicago (17th ed.)

MASON PAUL. WORLD IN PERILGRASSLANDS UNDER THREAT. 2009 Ed. MINNESOTA: HEINEMANN LIBRARY, 2019.

Cita MLA (9th ed.)

MASON PAUL. WORLD IN PERILGRASSLANDS UNDER THREAT. 2009 Ed. HEINEMANN LIBRARY, 2019.