APA (7th ed.) Citation

Harlow, W. M. (1931). The identification of the pines of the United States, native and introduced, by needle structure. New York state college of forestry at Syracuse university.

Chicago Style (17th ed.) Citation

Harlow, William M. The Identification of the Pines of the United States, Native and Introduced, by Needle Structure. [Syracuse, N.Y.]: New York state college of forestry at Syracuse university, 1931.

MLA (9th ed.) Citation

Harlow, William M. The Identification of the Pines of the United States, Native and Introduced, by Needle Structure. New York state college of forestry at Syracuse university, 1931.