  Matrix elements of flavor-diagonal light quark pseudoscalar densities and
axial anomaly operators between vacuum and {\eta} and {\eta}' meson states have
been determined. This has been done by evaluating current-current correlators
of octet-octet and octet-singlet axial currents using QCD sum rules. The
numerical values obtained for the matrix elements compare well with those
obtained in the current literature.
