APA (7th ed.) Citation

Oh, B. T. (2007). Essential oils of six Piper species.

Chicago Style (17th ed.) Citation

Oh, Boon Thai. Essential Oils of Six Piper Species. 2007.

MLA (9th ed.) Citation

Oh, Boon Thai. Essential Oils of Six Piper Species. 2007.

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