3G Elearning FZ LLC. (2016). Landscape installation and maintenance (softscape): Intermediate. 3G Elearning.
Citazione stile Chigago Style (17a edizione)3G Elearning FZ LLC. Landscape Installation and Maintenance (softscape): Intermediate. UAE: 3G Elearning, 2016.
Citatione MLA (9a ed.)3G Elearning FZ LLC. Landscape Installation and Maintenance (softscape): Intermediate. 3G Elearning, 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.