APA Citation

 O''Bryan, P. (2007).  Your portable empire: How to make money anywhere while doing what you love.  John Wiley & Sons, Inc.

Chicago Style Citation

 O''Bryan, Pat.  Your Portable Empire: How to Make Money Anywhere While Doing What You Love.  John Wiley & Sons, Inc, 2007.

MLA Citation

 O''Bryan, Pat.  Your Portable Empire: How to Make Money Anywhere While Doing What You Love.  John Wiley & Sons, Inc, 2007.

Warning: These citations may not always be 100% accurate.