Surya, Y. (2015). Pintar Berhitung Gasing (Gampang, Asyik, Menyenangkan). Kandel.
Chicago Style (17th ed.) CitationSurya, Yohanes. Pintar Berhitung Gasing (Gampang, Asyik, Menyenangkan). Kandel, 2015.
MLA (8th ed.) CitationSurya, Yohanes. Pintar Berhitung Gasing (Gampang, Asyik, Menyenangkan). Kandel, 2015.
Warning: These citations may not always be 100% accurate.