O’Bryan, P. (2007). Your portable empire: How to make money anywhere while doing what you love. Hoboken, N.J: John Wiley & Sons, Inc.
Trích dẫn kiểu ChicagoO’Bryan, Pat. Your Portable Empire: How to Make Money Anywhere While Doing What You Love. Hoboken, N.J: John Wiley & Sons, Inc, 2007.
Deismireacht MLAO’Bryan, Pat. Your Portable Empire: How to Make Money Anywhere While Doing What You Love. Hoboken, N.J: John Wiley & Sons, Inc, 2007.
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