Ginting, A. (2015). Trik Jitu Menggolkan Penjualan Anda. Grasindo.
Chicago Style (17th ed.) CitationGinting, Amsal. Trik Jitu Menggolkan Penjualan Anda. Grasindo, 2015.
MLA (8th ed.) CitationGinting, Amsal. Trik Jitu Menggolkan Penjualan Anda. Grasindo, 2015.
Warning: These citations may not always be 100% accurate.