Klag, R. W. (2006). Happy About apartment management: 30 years of expert tips and advice on multifamily property management. HappyAbout.info.
Chicago-Zitierstil (17. Ausg.)Klag, Robert W. Happy About Apartment Management: 30 Years of Expert Tips and Advice on Multifamily Property Management. Cupertino, CA: HappyAbout.info, 2006.
MLA-Zitierstil (9. Ausg.)Klag, Robert W. Happy About Apartment Management: 30 Years of Expert Tips and Advice on Multifamily Property Management. HappyAbout.info, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.