龚勋. (2009). 狂野地球奥秘: Mysteries of earth. 云南教育出版社.
Chicago Style aipamena龚勋. 狂野地球奥秘: Mysteries of Earth. 云南教育出版社, 2009.
MLA aipamena龚勋. 狂野地球奥秘: Mysteries of Earth. 云南教育出版社, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena