Stacy, R. A., & Shear, D. (1975). [Letter to David Shear]. Organisation for Economic Co-operation and Development.
Chicago-viite (17. p.)Stacy, Roy A., ja David Shear. [Letter to David Shear]. Paris: Organisation for Economic Co-operation and Development, 1975.
MLA-viite (8. p.)Stacy, Roy A., ja David Shear. [Letter to David Shear]. Organisation for Economic Co-operation and Development, 1975.
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