APA (7th ed.) Citation

HELMY Shahrul bin Zakaria. (1992). Column loudspeaker design. UTM.

Chicago Style (17th ed.) Citation

HELMY Shahrul bin Zakaria. Column Loudspeaker Design. Kuala Lumpur: UTM, 1992.

MLA (9th ed.) Citation

HELMY Shahrul bin Zakaria. Column Loudspeaker Design. UTM, 1992.

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