APA (7th ed.) Citation

Willard, J. (1964). Adventure trails in Montana. [publisher not identified].

Chicago Style (17th ed.) Citation

Willard, John. Adventure Trails in Montana. [Helena]: [publisher not identified], 1964.

MLA (9th ed.) Citation

Willard, John. Adventure Trails in Montana. [publisher not identified], 1964.

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