APA (7 ম সংস্করণ) উদ্ধৃতি

RIES AL. (1996). FOCUS: THE FUTURE OF YOUR COMPANY DEPENDS UPON IT. HARPER COLLINS PUBLISHERS.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

RIES AL. FOCUS: THE FUTURE OF YOUR COMPANY DEPENDS UPON IT. USA: HARPER COLLINS PUBLISHERS, 1996.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

RIES AL. FOCUS: THE FUTURE OF YOUR COMPANY DEPENDS UPON IT. HARPER COLLINS PUBLISHERS, 1996.