APA (7th ed.) Citation

Timber of the Yukon Valley--a stand of poplar (Populus balsamifera) in the middle section of the river.

Chicago Style (17th ed.) Citation

Timber of the Yukon Valley--a Stand of Poplar (Populus Balsamifera) in the Middle Section of the River.

MLA (9th ed.) Citation

Timber of the Yukon Valley--a Stand of Poplar (Populus Balsamifera) in the Middle Section of the River.

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