Gaya APA

Porras, J. et al (2006). SUCCESS BUILT TO LAST : cREATING A LIFE THAT MATTERS . united states of america: Wharton School Publishing.

Gaya MLA

Porras, Jerry. et al. "SUCCESS BUILT TO LAST : cREATING A LIFE THAT MATTERS". united states of america: Wharton School Publishing, 2006. Text.