CREATE TABLE table_16413 ("Romaji title" CLOB, "Japanese title" CLOB, "Release date" CLOB, "Reference" CLOB, "Oricon" FLOAT)

who is the reference when romaji title is heartbreak sniper?
SELECT "Reference" FROM table_16413 WHERE "Romaji title" = 'Heartbreak Sniper'
SELECT "Reference" FROM "table_16413" WHERE "Romaji title" = 'Heartbreak Sniper'