Gaya APA

Tullis, Graham. (1999). New Insight into business : workbook . Inggris: Longman.

Gaya Chicago

Tullis, Graham. New Insight into business : workbook. Inggris: Longman, 1999. Buku.

Gaya MLA

Tullis, Graham. New Insight into business : workbook. Inggris: Longman, 1999. Buku.

Gaya Turabian

Tullis, Graham. New Insight into business : workbook. Inggris: Longman, 1999. Buku.