APA (7th ed.) Citation

Harper, R. M. (1944). Preliminary report on the weeds of Alabama. [publisher not identified].

Chicago Style (17th ed.) Citation

Harper, Roland McMillan. Preliminary Report on the Weeds of Alabama. University, Ala.: [publisher not identified], 1944.

MLA (9th ed.) Citation

Harper, Roland McMillan. Preliminary Report on the Weeds of Alabama. [publisher not identified], 1944.