APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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