胡格 & 卢埃林. (2016). 怎样观察一棵树: Seeing trees. 商务印书馆.
Chicago Style (17th ed.) Citation胡格 and 卢埃林. 怎样观察一棵树: Seeing Trees. 商务印书馆, 2016.
MLA (8th ed.) Citation胡格 and 卢埃林. 怎样观察一棵树: Seeing Trees. 商务印书馆, 2016.
Warning: These citations may not always be 100% accurate.