APA (7th ed.) Citation

Petersen, N. F. (1912). Flora of Nebraska: A list of the conifers and flowering plants of the state with keys for their determination. The author.

Chicago Style (17th ed.) Citation

Petersen, Niels F. Flora of Nebraska: A List of the Conifers and Flowering Plants of the State with Keys for Their Determination. [Lincoln, Neb.]: The author, 1912.

MLA (9th ed.) Citation

Petersen, Niels F. Flora of Nebraska: A List of the Conifers and Flowering Plants of the State with Keys for Their Determination. The author, 1912.