Gaya APA

Charlton, R., Charlton, R. (2013). E-book How To Retire Early: Your Guide to Getting Rich Slowly and Retiring on Less . : CreateSpace Independent Publishing Platform.

Gaya MLA

Charlton, Robert., Charlton, Robin. "E-book How To Retire Early: Your Guide to Getting Rich Slowly and Retiring on Less". : CreateSpace Independent Publishing Platform, 2013. Text.