CREATE TABLE table_61959 ("President" TEXT, "Treasurer" TEXT, "Secretary" TEXT, "Social AO" TEXT, "Academic AO" TEXT, "Internal CO" TEXT, "External CO" TEXT)

What Secretary has an Internal CO of isabel voets?
SELECT "Secretary" FROM table_61959 WHERE "Internal CO" = 'isabel voets'
SELECT "Secretary" FROM "table_61959" WHERE "Internal CO" = 'isabel voets'