Gaya APA
Singh, M. (2013).
Unlocking the world's Largest financial secret 12 kunci menguasai valuta asing (forex) .
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Singh, Mario.
"Unlocking the world's Largest financial secret 12 kunci menguasai valuta asing (forex)".
Jakarta:
Gramedia Pustaka Utama,
2013.
Buku.