Barnard. Nature Contained. NUS Press Pte Ltd.
Cita Chicago (17th ed.)Barnard. Nature Contained. NUS Press Pte Ltd.
Cita MLA (8th ed.)Barnard. Nature Contained. NUS Press Pte Ltd.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)