RITCHIE, K. (1995). Marketing To Generation X Karen Ritchie. Lexington Books.
Lua i Stíl Chicago (17ú heag.)RITCHIE, Karen. Marketing To Generation X Karen Ritchie. Lexington Books, 1995.
Lua MLA (8ú heag.)RITCHIE, Karen. Marketing To Generation X Karen Ritchie. Lexington Books, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.