APA (7th ed.) Citation

Dzulkarnain Idris. (2011). Langkah demi langkah: Microsoft Excel 2010. Venton Publishing.

Chicago Style (17th ed.) Citation

Dzulkarnain Idris. Langkah Demi Langkah: Microsoft Excel 2010. Kuala Lumpur: Venton Publishing, 2011.

MLA (8th ed.) Citation

Dzulkarnain Idris. Langkah Demi Langkah: Microsoft Excel 2010. Venton Publishing, 2011.

Warning: These citations may not always be 100% accurate.