(2010). 生活的准则: Laws of life. 印刷工业出版社.
Chicago Style aipamena生活的准则: Laws of Life. 印刷工业出版社, 2010.
MLA aipamena生活的准则: Laws of Life. 印刷工业出版社, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
(2010). 生活的准则: Laws of life. 印刷工业出版社.
Chicago Style aipamena生活的准则: Laws of Life. 印刷工业出版社, 2010.
MLA aipamena生活的准则: Laws of Life. 印刷工业出版社, 2010.