CREATE TABLE table_15169 ("Representative" TEXT, "Title" TEXT, "Presentation of Credentials" TEXT, "Termination of Mission" TEXT, "Appointed by" TEXT)

What Title has a Presentation of Credentials of October 4, 1988?
SELECT "Title" FROM table_15169 WHERE "Presentation of Credentials" = 'october 4, 1988'
SELECT "Title" FROM "table_15169" WHERE "Presentation of Credentials" = 'october 4, 1988'