3G Elearning FZ LLC. (2016). Landscape installation and maintenance (softscape): Intermediate. 3G Elearning.
芝加哥风格引文3G Elearning FZ LLC. Landscape Installation and Maintenance (softscape): Intermediate. UAE: 3G Elearning, 2016.
MLA引文3G Elearning FZ LLC. Landscape Installation and Maintenance (softscape): Intermediate. 3G Elearning, 2016.
警告：这些引文格式不一定是100％准确.