YIN ROBERT K. (1993). APPLICATION OF CASE STUDY RESEARCH. SAGE PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)YIN ROBERT K. APPLICATION OF CASE STUDY RESEARCH. NEWBURY PARK: SAGE PUBLICATIONS, 1993.
Lua MLA (9ú heag.)YIN ROBERT K. APPLICATION OF CASE STUDY RESEARCH. SAGE PUBLICATIONS, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.