How to make this query a little bit more readable?

PHP Code:

        $fname_format = "CONCAT(b.last_name, ', ', b.first_name, ' ', b.middle_name) AS full_name";
        $this->db->select("a.id, b.id AS employee_id, {$fname_format}, c.id AS machine_id, c.title AS machine, d.title AS hstatus, a.created_on, a.action_on, a.edit_on, a.problems_encountered, a.corrective_action,a.root_caused,a.remarks,a.item_replaced");
        $this->db->from("reports AS a");
        $this->db->join("employees AS b", "b.id = a.employee_id");
        $this->db->join("machines AS c", "c.id = a.machine_id");
        $this->db->join("hstatus AS d", "d.id = a.hstatus_id");
        return this->db->get()->result_array(); 


Look at the select part, it's so ugly...