Husain, D. A. Essential oil plants and their cultivation.
Citazione stile Chigago Style (17a edizione)Husain, Dr. Akhtar. Essential Oil Plants and Their Cultivation.
Citatione MLA (9a ed.)Husain, Dr. Akhtar. Essential Oil Plants and Their Cultivation.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.