APA (7th ed.) Citation

Willard, J. F. (1918). The Union colony at Greeley, Colorado, 1869-1871. [publisher not identified].

Chicago Style (17th ed.) Citation

Willard, James F. The Union Colony at Greeley, Colorado, 1869-1871. Boulder: [publisher not identified], 1918.

MLA (9th ed.) Citation

Willard, James F. The Union Colony at Greeley, Colorado, 1869-1871. [publisher not identified], 1918.